# UI dash board displayed just blank page

**URL:** <https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771>\
**Category:** Dashboard\
**Created:** [13 December 2018 22:05 UTC](https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771 "2018-12-13T22:05:22Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![kenkoknz](https://avatars.discourse-cdn.com/v4/letter/k/58956e/32.png) [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Post date:** [13 December 2018 22:05 UTC](https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771/1 "2018-12-13T22:05:22Z")

</div>

Hi,  
No sure what I ve done, but the dashboard loads ok, but just shows a blank page no errors (localhost:1880/ui/)  
I am sure it worked before.

Information below:

Environment:  
HW Pi2  
NR v0185  
Dash ver: 2.12.1

Screenshot:

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/1/1676fbc0d51531e17b9e3d1d939f11179f0e86fd.png)

Log:

pi@raspberrypi:~ $ node-red -log  
14 Dec 10:31:44 - [info]

# Welcome to Node-RED

14 Dec 10:31:44 - [info] Node-RED version: v0.18.5  
14 Dec 10:31:44 - [info] Node.js version: v8.11.3  
14 Dec 10:31:44 - [info] Linux 4.14.52-v7+ arm LE  
14 Dec 10:31:46 - [info] Loading palette nodes  
14 Dec 10:31:56 - [info] Dashboard version 2.12.2 started at /ui  
14 Dec 10:31:59 - [info] Settings file : /home/pi/.node-red/settings.js  
14 Dec 10:31:59 - [info] User directory : /home/pi/.node-red  
14 Dec 10:31:59 - [warn] Projects disabled : set editorTheme.projects.enabled=true to enable  
14 Dec 10:31:59 - [info] Flows file : /home/pi/.node-red/flows\_raspberrypi.json  
14 Dec 10:31:59 - [error] Unable to listen on [http://127.0.0.1:1880/](http://127.0.0.1:1880/)  
14 Dec 10:31:59 - [error] Error: port in use

The Flow: Just a slider and gauge  
[{"id":"36fce3a2.8fc19c","type":"ui\_slider","z":"8bed80ab.a57f","name":"","label":"slider","tooltip":"","group":"4b83e494.d25e2c","order":2,"width":0,"height":0,"passthru":true,"outs":"all","topic":"","min":0,"max":10,"step":1,"x":176,"y":304,"wires":[["4f671ff9.34786"]]},{"id":"4f671ff9.34786","type":"ui\_gauge","z":"8bed80ab.a57f","name":"","group":"4b83e494.d25e2c","order":1,"width":0,"height":0,"gtype":"gage","title":"gauge","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","x":341,"y":307,"wires":},{"id":"4b83e494.d25e2c","type":"ui\_group","z":"","name":"Default","tab":"bbd7322e.c5c82","disp":true,"width":"6","collapse":false},{"id":"bbd7322e.c5c82","type":"ui\_tab","z":"","name":"Home","icon":"dashboard"}]

Thanks,  
Ken

---

<div class="post-metadata">

**Author:** ![ukmoose](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ukmoose/32/13_2.png) [@ukmoose](https://discourse.nodered.org/u/ukmoose)\
**Post date:** [13 December 2018 22:15 UTC](https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771/2 "2018-12-13T22:15:33Z")

</div>

> [@kenkoknz](#):
>
> 14 Dec 10:31:59 - [error] Unable to listen on [http://127.0.0.1:1880/](http://127.0.0.1:1880/)  
> 14 Dec 10:31:59 - [error] Error: port in use

would suggest you already have another copy of Node-RED open. Have you tried rebooting your pi and seeing if it fixes it?

Also the latest version of Node-RED is v0.19.5 so it might be worth upgrading to gain access to the latest functionality improvements, there’s a script you can run that’s linked from the raspberry pi page in the docs

---

<div class="post-metadata">

**Author:** ![kenkoknz](https://avatars.discourse-cdn.com/v4/letter/k/58956e/32.png) [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Post date:** [13 December 2018 23:43 UTC](https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771/3 "2018-12-13T23:43:18Z")

</div>

Hi,  
have tried rebooted many times and also stop other flow tabs. below is ps -aux list of process running

pi@raspberrypi:~ $ ps -aux  
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND  
root 1 1.3 0.6 9548 5928 ? Ss 12:37 0:02 /sbin/init spla  
root 2 0.0 0.0 0 0 ? S 12:37 0:00 [kthreadd]  
root 3 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/0:0]  
root 4 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/0:0H]  
root 5 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/u8:0]  
root 6 0.0 0.0 0 0 ? I\< 12:37 0:00 [mm\_percpu\_wq]  
root 7 0.0 0.0 0 0 ? S 12:37 0:00 [ksoftirqd/0]  
root 8 0.1 0.0 0 0 ? I 12:37 0:00 [rcu\_sched]  
root 9 0.0 0.0 0 0 ? I 12:37 0:00 [rcu\_bh]  
root 10 0.0 0.0 0 0 ? S 12:37 0:00 [migration/0]  
root 11 0.0 0.0 0 0 ? S 12:37 0:00 [cpuhp/0]  
root 12 0.0 0.0 0 0 ? S 12:37 0:00 [cpuhp/1]  
root 13 0.0 0.0 0 0 ? S 12:37 0:00 [migration/1]  
root 14 0.0 0.0 0 0 ? S 12:37 0:00 [ksoftirqd/1]  
root 15 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/1:0]  
root 16 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/1:0H]  
root 17 0.0 0.0 0 0 ? S 12:37 0:00 [cpuhp/2]  
root 18 0.0 0.0 0 0 ? S 12:37 0:00 [migration/2]  
root 19 0.0 0.0 0 0 ? S 12:37 0:00 [ksoftirqd/2]  
root 20 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/2:0]  
root 21 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/2:0H]  
root 22 0.0 0.0 0 0 ? S 12:37 0:00 [cpuhp/3]  
root 23 0.0 0.0 0 0 ? S 12:37 0:00 [migration/3]  
root 24 0.0 0.0 0 0 ? S 12:37 0:00 [ksoftirqd/3]  
root 25 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/3:0]  
root 26 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/3:0H]  
root 27 0.0 0.0 0 0 ? S 12:37 0:00 [kdevtmpfs]  
root 28 0.0 0.0 0 0 ? I\< 12:37 0:00 [netns]  
root 29 0.1 0.0 0 0 ? I 12:37 0:00 [kworker/0:1]  
root 30 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/1:1]  
root 31 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/2:1]  
root 32 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/3:1]  
root 33 0.0 0.0 0 0 ? S 12:37 0:00 [khungtaskd]  
root 34 0.0 0.0 0 0 ? S 12:37 0:00 [oom\_reaper]  
root 35 0.0 0.0 0 0 ? I\< 12:37 0:00 [writeback]  
root 36 0.0 0.0 0 0 ? S 12:37 0:00 [kcompactd0]  
root 37 0.0 0.0 0 0 ? I\< 12:37 0:00 [crypto]  
root 38 0.0 0.0 0 0 ? I\< 12:37 0:00 [kblockd]  
root 39 0.0 0.0 0 0 ? I\< 12:37 0:00 [watchdogd]  
root 40 0.0 0.0 0 0 ? I\< 12:37 0:00 [rpciod]  
root 41 0.0 0.0 0 0 ? I\< 12:37 0:00 [xprtiod]  
root 42 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/u8:1]  
root 44 0.0 0.0 0 0 ? S 12:37 0:00 [kswapd0]  
root 45 0.0 0.0 0 0 ? I\< 12:37 0:00 [nfsiod]  
root 55 0.0 0.0 0 0 ? I\< 12:37 0:00 [kthrotld]  
root 56 0.0 0.0 0 0 ? I\< 12:37 0:00 [iscsi\_eh]  
root 57 0.0 0.0 0 0 ? I\< 12:37 0:00 [dwc\_otg]  
root 58 0.0 0.0 0 0 ? I\< 12:37 0:00 [DWC Notificati  
root 59 0.0 0.0 0 0 ? S\< 12:37 0:00 [vchiq-slot/0]  
root 60 0.0 0.0 0 0 ? S\< 12:37 0:00 [vchiq-recy/0]  
root 61 0.0 0.0 0 0 ? S\< 12:37 0:00 [vchiq-sync/0]  
root 62 0.0 0.0 0 0 ? S 12:37 0:00 [vchiq-keep/0]  
root 63 0.0 0.0 0 0 ? S\< 12:37 0:00 [SMIO]  
root 64 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/0:2]  
root 65 1.1 0.0 0 0 ? S 12:37 0:02 [mmcqd/0]  
root 66 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/0:3]  
root 67 0.0 0.0 0 0 ? S 12:37 0:00 [jbd2/mmcblk0p7  
root 68 0.0 0.0 0 0 ? I\< 12:37 0:00 [ext4-rsv-conve  
root 69 0.0 0.0 0 0 ? I\< 12:37 0:00 [ipv6\_addrconf]  
root 84 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/2:1H]  
root 92 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/1:2]  
root 96 0.5 0.4 26924 4544 ? Ss 12:37 0:01 /lib/systemd/sy  
root 125 0.3 0.3 14676 3412 ? Ss 12:37 0:00 /lib/systemd/sy  
root 128 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/3:2]  
root 132 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/2:2]  
root 135 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/u8:2]  
root 197 0.0 0.0 0 0 ? I\< 12:37 0:00 [cfg80211]  
root 232 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/3:3]  
root 237 0.0 0.0 0 0 ? I 12:37 0:00 [kworker/u8:3]  
systemd+ 243 0.0 0.3 17280 3568 ? Ssl 12:37 0:00 /lib/systemd/sy  
root 269 0.0 0.2 23748 2472 ? Ssl 12:37 0:00 /usr/sbin/rsysl  
root 270 0.0 0.2 5300 2412 ? Ss 12:37 0:00 /usr/sbin/cron  
message+ 272 0.2 0.3 6612 3660 ? Ss 12:37 0:00 /usr/bin/dbus-d  
nobody 281 0.0 0.2 5296 2424 ? Ss 12:37 0:00 /usr/sbin/thd -  
root 283 0.0 0.4 7380 4204 ? Ss 12:37 0:00 /lib/systemd/sy  
pi 284 10.9 7.0 160896 66564 ? SNsl 12:37 0:22 node-red  
avahi 287 0.0 0.3 6404 3188 ? Ss 12:37 0:00 avahi-daemon: r  
root 303 0.0 0.1 2948 1796 ? Ss 12:37 0:00 /sbin/dhcpcd -q  
avahi 304 0.0 0.0 6404 324 ? S 12:37 0:00 avahi-daemon: c  
root 331 0.0 0.0 0 0 ? S 12:37 0:00 [RTW\_CMD\_THREAD  
root 334 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/3:1H]  
root 335 0.0 0.4 10160 4108 ? Ss 12:37 0:00 wpa\_supplicant  
root 386 0.1 0.7 39964 7312 ? Ssl 12:37 0:00 /usr/sbin/light  
root 388 0.0 0.0 0 0 ? I\< 12:37 0:00 [kworker/1:1H]  
root 391 0.0 0.1 4196 1536 tty1 Ss+ 12:37 0:00 /sbin/agetty --  
root 399 9.2 1.1 164960 11168 ? Sl 12:38 0:18 /opt/teamviewer  
root 421 3.5 7.3 223976 69392 tty7 Rsl+ 12:38 0:07 /usr/lib/xorg/X  
root 445 0.0 0.8 32188 7628 ? Sl 12:38 0:00 lightdm --sessi  
pi 453 0.1 0.6 9756 6004 ? Ss 12:38 0:00 /lib/systemd/sy  
pi 456 0.0 0.1 11212 1312 ? S 12:38 0:00 (sd-pam)  
pi 464 2.3 7.4 346812 70560 ? Sl 12:38 0:04  
pi 467 0.2 1.2 52180 12248 ? Ssl 12:38 0:00 /usr/bin/lxsess  
pi 479 0.1 0.3 6512 3516 ? Ss 12:38 0:00 /usr/bin/dbus-d  
pi 589 0.0 0.0 3796 228 ? Ss 12:38 0:00 /usr/bin/ssh-ag  
pi 609 0.0 0.6 39468 5768 ? Ssl 12:38 0:00 /usr/lib/gvfs/g  
pi 614 0.0 0.6 56484 6540 ? Sl 12:38 0:00 /usr/lib/gvfs/g  
pi 634 0.4 1.5 53864 14788 ? S 12:38 0:00 openbox --confi  
pi 635 0.0 0.9 42752 8732 ? Sl 12:38 0:00 lxpolkit  
pi 637 1.5 2.5 139756 23744 ? Sl 12:38 0:02 lxpanel --profi  
pi 644 1.5 2.7 133268 26028 ? Sl 12:38 0:02 pcmanfm --deskt  
root 650 0.0 0.0 0 0 ? I\< 12:38 0:00 [kworker/0:1H]  
pi 655 0.0 0.0 3796 228 ? Ss 12:38 0:00 /usr/bin/ssh-ag  
root 659 0.1 0.9 41468 8584 ? Ssl 12:38 0:00 /usr/lib/policy  
pi 682 0.0 0.6 28444 6192 ? Ssl 12:38 0:00 /usr/lib/menu-c  
pi 693 0.0 0.0 0 0 ? Z 12:38 0:00 [sh]   
pi 698 0.1 1.0 83532 10440 ? Ssl 12:38 0:00 /usr/lib/gvfs/g  
root 701 0.2 0.9 59356 9192 ? Ssl 12:38 0:00 /usr/lib/udisks  
pi 708 0.0 0.4 37160 4404 ? Ssl 12:38 0:00 /usr/lib/gvfs/g  
pi 712 0.0 0.5 37108 4856 ? Ssl 12:38 0:00 /usr/lib/gvfs/g  
pi 716 0.0 0.5 38680 5124 ? Ssl 12:38 0:00 /usr/lib/gvfs/g  
pi 720 0.0 0.5 50784 4748 ? Ssl 12:38 0:00 /usr/lib/gvfs/g  
pi 737 0.1 0.8 51152 7784 ? Sl 12:38 0:00 /usr/lib/gvfs/g  
root 744 0.0 0.0 0 0 ? S 12:38 0:00 [jbd2/mmcblk0p5  
root 745 0.0 0.0 0 0 ? I\< 12:38 0:00 [ext4-rsv-conve  
pi 753 25.6 20.0 688088 190556 ? Sl 12:38 0:43 /usr/lib/chromi  
pi 775 0.1 3.5 209768 33464 ? S 12:38 0:00 /usr/lib/chromi  
pi 777 0.0 0.9 209768 8684 ? S 12:38 0:00 /usr/lib/chromi  
pi 788 1.0 1.9 46736 18800 ? Rl 12:38 0:01 lxterminal  
pi 789 0.0 0.1 2360 1448 ? S 12:38 0:00 gnome-pty-helpe  
pi 790 0.1 0.4 6112 4080 pts/0 Ss 12:38 0:00 bash  
pi 908 0.9 6.1 338424 58324 ? Sl 12:38 0:01 /usr/lib/chromi  
pi 910 7.3 8.8 397380 84264 ? Sl 12:38 0:11 /usr/lib/chromi  
pi 936 5.1 9.1 396816 87292 ? Sl 12:38 0:08 /usr/lib/chromi  
pi 1128 24.4 12.4 451180 118128 ? Sl 12:38 0:36 /usr/lib/chromi  
pi 1144 12.5 11.7 422188 111580 ? Sl 12:38 0:18 /usr/lib/chromi  
pi 1162 19.2 14.7 470092 140208 ? Sl 12:38 0:28 /usr/lib/chromi  
pi 1213 0.0 0.3 7744 2984 pts/0 R+ 12:41 0:00 ps -aux

thanks,

---

<div class="post-metadata">

**Author:** ![kenkoknz](https://avatars.discourse-cdn.com/v4/letter/k/58956e/32.png) [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Post date:** [13 December 2018 23:52 UTC](https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771/4 "2018-12-13T23:52:10Z")

</div>

Sorry the first log was wrong forgot a -  
below is Log:  
pi@raspberrypi:~ $ node-red-log

14 Dec 12:37:46 - [info] Linux 4.14.52-v7+ arm LE  
14 Dec 12:37:49 - [info] Loading palette nodes  
14 Dpi@raspberrypi:~ $ node-red-log

## 14 Dec 12:37:46 - [info] Linux 4.14.52-v7+ arm LE 14 Dec 12:37:49 - [info] Loading palette nodes 14 Dec 12:38:02 - [info] Dashboard version 2.12.2 started at /ui 14 Dec 12:38:29 - [info] Settings file : /home/pi/.node-red/settings.js 14 Dec 12:38:29 - [info] User directory : /home/pi/.node-red 14 Dec 12:38:29 - [warn] Projects disabled : set editorTheme.projects.enabled=true to enable 14 Dec 12:38:29 - [info] Flows file : /home/pi/.node-red/flows\_raspberrypi.json 14 Dec 12:38:29 - [info] Server now running at [http://127.0.0.1:1880/](http://127.0.0.1:1880/) 14 Dec 12:38:29 - [warn]

## Your flow credentials file is encrypted using a system-generated key. If the system-generated key is lost for any reason, your credentials file will not be recoverable, you will have to delete it and re-enter your credentials. You should set your own key using the 'credentialSecret' option in your settings file. Node-RED will then re-encrypt your credentials file using your chosen key the next time you deploy a change.

14 Dec 12:38:29 - [info] Starting flows  
14 Dec 12:38:29 - [info] Started flows  
14 Dec 12:38:29 - [error] [arduino-board:ad9371f6.9b0b] port not found : /dev/ttyACM0  
Stopping Node-RED graphical event wiring tool...  
14 Dec 12:47:28 - [info] Stopping flows  
14 Dpi@raspberrypi:~ $ node-red-log

## 14 Dec 12:37:46 - [info] Linux 4.14.52-v7+ arm LE 14 Dec 12:37:49 - [info] Loading palette nodes 14 Dec 12:38:02 - [info] Dashboard version 2.12.2 started at /ui 14 Dec 12:38:29 - [info] Settings file : /home/pi/.node-red/settings.js 14 Dec 12:38:29 - [info] User directory : /home/pi/.node-red 14 Dec 12:38:29 - [warn] Projects disabled : set editorTheme.projects.enabled=true to enable 14 Dec 12:38:29 - [info] Flows file : /home/pi/.node-red/flows\_raspberrypi.json 14 Dec 12:38:29 - [info] Server now running at [http://127.0.0.1:1880/](http://127.0.0.1:1880/) 14 Dec 12:38:29 - [warn]

## Your flow credentials file is encrypted using a system-generated key. If the system-generated key is lost for any reason, your credentials file will not be recoverable, you will have to delete it and re-enter your credentials. You should set your own key using the 'credentialSecret' option in your settings file. Node-RED will then re-encrypt your credentials file using your chosen key the next time you deploy a change.

## 14 Dec 12:38:29 - [info] Starting flows 14 Dec 12:38:29 - [info] Started flows 14 Dec 12:38:29 - [error] [arduino-board:ad9371f6.9b0b] port not found : /dev/ttyACM0 Stopping Node-RED graphical event wiring tool... 14 Dec 12:47:28 - [info] Stopping flows 14 Dec 12:47:28 - [info] Stopped flows Stopped Node-RED graphical event wiring tool. ec 12:47:28 - [info] Stopped flows Stopped Node-RED graphical event wiring tool. ec 12:38:02 - [info] Dashboard version 2.12.2 started at /ui 14 Dec 12:38:29 - [info] Settings file : /home/pi/.node-red/settings.js 14 Dec 12:38:29 - [info] User directory : /home/pi/.node-red 14 Dec 12:38:29 - [warn] Projects disabled : set editorTheme.projects.enabled=true to enable 14 Dec 12:38:29 - [info] Flows file : /home/pi/.node-red/flows\_raspberrypi.json 14 Dec 12:38:29 - [info] Server now running at [http://127.0.0.1:1880/](http://127.0.0.1:1880/) 14 Dec 12:38:29 - [warn]

## Your flow credentials file is encrypted using a system-generated key. If the system-generated key is lost for any reason, your credentials file will not be recoverable, you will have to delete it and re-enter your credentials. You should set your own key using the 'credentialSecret' option in your settings file. Node-RED will then re-encrypt your credentials file using your chosen key the next time you deploy a change.

14 Dec 12:38:29 - [info] Starting flows  
14 Dec 12:38:29 - [info] Started flows  
14 Dec 12:38:29 - [error] [arduino-board:ad9371f6.9b0b] port not found : /dev/ttyACM0  
Stopping Node-RED graphical event wiring tool...  
14 Dec 12:47:28 - [info] Stopping flows  
14 Dec 12:47:28 - [info] Stopped flows  
Stopped Node-RED graphical event wiring tool.

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [14 December 2018 09:50 UTC](https://discourse.nodered.org/t/ui-dash-board-displayed-just-blank-page/5771/5 "2018-12-14T09:50:54Z")

</div>

Have a look in the browser developer console window and see if there are any errors (that's the browser console not a terminal). Open the browser console and force a full refresh of the page.