Ui not displaying anything

Hello good morning.
My UI stoped display today and only displays connection lost at the bottom left of the screen. I have lost of dashboard nodes in my flow but still cant get anything in the ui

Connection lost means that node-red is probably stopped. Have you checked it it is still active?
Also make sure to refresh your browser.

Yes node red is still active. I have refreshed the browser and even try using a different one but i got the same problem.

What happens if you stop/restart NR?

nothing changed. i just did that now.

Does it work on the node-red machine if you open http://localhost:1880/ui/ ?

What is the IP of your node-red machine? Is it DHCP? Perhaps it has a new IP address?

Have you looked at the startup log from node-red to see if there is anything there. Depending on how you installed it you may be able to get that by running
node-red-stop
node-red-start
Possibly worth posting it here.
Have you installed another dashboard possibly?

its the same thing in localhost. blank screen with connection lost.

i did this too but nothing changed

Did you make any changes just before this happened?

Please export your flow and attach it to a reply (read this first)

Did what? Also you haven't posted the log.

here is the log

$ node-red-log

  • /usr/lib/node_modules/node-red/node_modules/@node-red/registry/lib/loader.js
  • /usr/lib/node_modules/node-red/node_modules/@node-red/registry/lib/index.js
  • /usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/nodes/index.js
  • /usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/index.js
  • /usr/lib/node_modules/node-red/lib/red.js
  • /usr/lib/node_modules/node-red/red.js
    20 May 14:18:48 - [warn] ------------------------------------------------------
    20 May 14:18:48 - [info] Settings file : /home/pi/.node-red/settings.js
    20 May 14:18:48 - [info] Context store : 'default' [module=memory]
    20 May 14:18:48 - [info] User directory : /home/pi/.node-red
    20 May 14:18:48 - [warn] Projects disabled : editorTheme.projects.enabled=false
    20 May 14:18:48 - [info] Flows file : /home/pi/.node-red/flows_raspberrypi.json
    20 May 14:18:48 - [info] Server now running at http://127.0.0.1:1880/
    20 May 14:18:48 - [warn]

We need to see the beginning. Please run
node-red-stop
node-red-start
and paste it all here.

pi@raspberrypi:~ $ node-red-stop

Stop Node-RED

Use node-red-start to start Node-RED again

pi@raspberrypi:~ $ node-red-start

Start Node-RED

Once Node-RED has started, point a browser at http://192.168.8.102:1880
On Pi Node-RED works better with the Firefox or Chrome browser

Use node-red-stop to stop Node-RED
Use node-red-start to start Node-RED again
Use node-red-log to view the recent log output
Use sudo systemctl enable nodered.service to autostart Node-RED at every boot
Use sudo systemctl disable nodered.service to disable autostart on boot

To find more nodes and example flows - go to http://flows.nodered.org

Starting as a systemd service.
21 May 07:06:15 - [info]
Welcome to Node-RED

21 May 07:06:15 - [info] Node-RED version: v1.0.6
21 May 07:06:15 - [info] Node.js version: v10.19.0
21 May 07:06:15 - [info] Linux 4.19.97-v7+ arm LE
21 May 07:06:19 - [info] Loading palette nodes
21 May 07:06:25 - [info] Dashboard version 2.22.1 started at /ui
21 May 07:06:26 - [info] Settings file : /home/pi/.node-red/settings.js
21 May 07:06:26 - [info] Context store : 'default' [module=memory]
21 May 07:06:26 - [info] User directory : /home/pi/.node-red
21 May 07:06:26 - [warn] Projects disabled : editorTheme.projects.enabled=false
21 May 07:06:26 - [info] Flows file : /home/pi/.node-red/flows_raspberrypi.json
21 May 07:06:26 - [info] Server now running at http://127.0.0.1:1880/
21 May 07:06:26 - [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.

21 May 07:06:26 - [info] Starting flows
21 May 07:06:26 - [warn] [telegram sender:Your bot] bot not initialized.
21 May 07:06:26 - [warn] [telegram command:chenko] bot not initialized.
21 May 07:06:26 - [warn] [telegram sender:Send response] bot not initialized.
21 May 07:06:26 - [warn] [telegram command:a79b749a.278748] bot not initialized.
21 May 07:06:27 - [warn] [telegram receiver:c4ce3ebf.5ae48] bot not initialized
21 May 07:06:27 - [warn] [telegram sender:Send response] bot not initialized.
21 May 07:06:31 - [info] Started flows
21 May 07:06:31 - [error] [sqlitedb:568a490c.da4d38] failed to open /home/pi/sqlite/diagnostic
21 May 07:06:31 - [error] [sqlitedb:e9514121.111fd] failed to open /home/pi/dbs/iot.db
21 May 07:06:31 - [info] [mqtt-broker:locahost] Connection failed to broker: note1@mqtt://localhost:1883

1.Is the node-red editor working ok?
2. Do you expect all those errors and warnings in the log? If not then it might be worth sorting those in case the problem is a side effect of one of those.
3. If you run top in a terminal is it showing that node red is using lots of processor?

Yes the node red editor is working very well with no issues
I dont understand the second point
Wen i do top i dont get anything about node red.
I have even reinstalled node red the same thing. I went on as to even flashing my pi back to a raspbian but still the same errors.

What @Colin was asking it there are numorus [warn] and two [error] messages in the startup log and they may be part of the problem.

  1. go into your flow and disable the telegram node and sqlite node - down in the lower left of every node is a enable/disable button. So disable those nodes.
    Screen Shot 2020-05-21 at 7.36.22 AM
  2. the first image you posted looks like it you were accessing the dashboard from a phone. What if yo access it from the NR editor?
    Screen Shot 2020-05-21 at 7.38.07 AM

I disabled the nodes and also access the ui using the second means and dere was no different

Hello
Thanks very much to every one who help i finally opened a new flow added a ui node dere configured it, then restarted node red and boom the ui was there