ui_mp4frag is disabled, i can show all my tab and buttons in Dark them
ui_mp4frag is enabled, tabs and buttons disapear and fall in Light theme
Node-Red 2.0.4 run on a win10 PC, with chrome v92 , and your last "npm install kevinGodell/node-red-contrib-xxx" spawn/mp4frag, package
Note : the issue was the same with N.R 1.3.5
@kevinGodell Have you an idea ?
I am unable to duplicate this issue. Perhaps because I am still on nr version 1.1.3. I might have time in a few days to try upgrading nr and try your flow.
FYI: I don't have this problem on raspberry.
I only have it on WIN10. I already had this problem with Node-Red 1.3.5 and again with the Update to 2.0.4.
It can wait, end your emergencies 
Do you have info about how you installed your node-red on windows 10? I should be able to try this later, but I would like to follow whatever tutorial or instructions that you have used to best mimic your environment.
I just finished trying out a new install on windows 10.
nr version 2.0.5
node.js 14
installed nodes:
node-red-dashboard@next (3.0.0-beta)
kevinGodell/node-red-contrib-ffmpeg-spawn
kevinGodell/node-red-contrib-mp4frag
kevinGodell/node-red-contrib-ui-mp4frag
Dark mode and light mode works OK for me. Did you try dashboard v3 yet?
You went faster than I had time to answer you 
i try this beta and come back
If you can, please share that flow. Perhaps there is some strange conflict between your other ui elements and ui_mp4frag. I might be able to debug that client side in the browser.
here is the flow , change Credencials in args.
[{"id":"b0063263318f9047","type":"ffmpeg-spawn","z":"ca690f62.6091a","name":"","outputs":3,"migrate":2e-9,"cmdPath":"C:\\Users\\vanes\\node_modules\\@ffmpeg-installer\\win32-x64\\ffmpeg.exe","cmdArgs":"[\"-loglevel\",\"quiet\",\"-rtsp_transport\",\"tcp\",\"-i\",\"rtsp://192.168.1.11:554/user=xxxxx_password=xxxxxx_channel=0_stream=1.sdp?real_stream\",\"-c:a\",\"aac\",\"-c:v\",\"copy\",\"-f\",\"mp4\",\"-movflags\",\"+frag_keyframe+empty_moov+default_base_moof\",\"pipe:1\",\"-progress\",\"pipe:2\"]","cmdOutputs":2,"killSignal":"SIGTERM","msgOutput":"split","x":260,"y":360,"wires":[["924f6e9d3346a327"],["924f6e9d3346a327"],[]]}]
it only contains ffmpeg-spawn
[{"id":"371c250950c06ee5","type":"ui_slider","z":"ca690f62.6091a","name":"","label":"slider","tooltip":"","group":"e4b2e288f68a7d79","order":2,"width":0,"height":0,"passthru":true,"outs":"all","topic":"topic","topicType":"msg","min":0,"max":10,"step":1,"x":50,"y":290,"wires":[[]]},{"id":"d7fbdb67f4c3a6c8","type":"comment","z":"ca690f62.6091a","name":"==================== video/cam ==============","info":"","x":200,"y":260,"wires":[]},{"id":"688349fc.7a7948","type":"inject","z":"ca690f62.6091a","name":"start default","props":[{"p":"action","v":"{\"command\":\"start\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":"1","topic":"","x":90,"y":350,"wires":[["b0063263318f9047"]]},{"id":"88b05b9b.cf0308","type":"inject","z":"ca690f62.6091a","name":"stop default","props":[{"p":"action","v":"{\"command\":\"stop\"}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payloadType":"str","x":90,"y":380,"wires":[["b0063263318f9047"]]},{"id":"b0063263318f9047","type":"ffmpeg-spawn","z":"ca690f62.6091a","name":"","outputs":3,"migrate":2e-9,"cmdPath":"C:\\Users\\vanes\\node_modules\\@ffmpeg-installer\\win32-x64\\ffmpeg.exe","cmdArgs":"[\"-loglevel\",\"quiet\",\"-rtsp_transport\",\"tcp\",\"-i\",\"rtsp://192.168.1.11:554/user=xxxxx_password=xxxxxx_channel=0_stream=1.sdp?real_stream\",\"-c:a\",\"aac\",\"-c:v\",\"copy\",\"-f\",\"mp4\",\"-movflags\",\"+frag_keyframe+empty_moov+default_base_moof\",\"pipe:1\",\"-progress\",\"pipe:2\"]","cmdOutputs":2,"killSignal":"SIGTERM","msgOutput":"split","x":260,"y":360,"wires":[["924f6e9d3346a327"],["924f6e9d3346a327"],[]]},{"id":"924f6e9d3346a327","type":"mp4frag","z":"ca690f62.6091a","name":"","migrate":2e-9,"hlsPlaylistSize":4,"hlsPlaylistExtra":0,"basePath":"cam","repeated":"false","timeLimit":10000,"preBuffer":1,"x":440,"y":350,"wires":[["760e9de0c7aac00f"],[]]},{"id":"760e9de0c7aac00f","type":"ui_mp4frag","z":"ca690f62.6091a","name":"","group":"e4b2e288f68a7d79","order":3,"width":6,"height":4,"readyPoster":"data:image/png;base64,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","hlsJsConfig":"{\"liveDurationInfinity\":true,\"liveBackBufferLength\":5,\"maxBufferLength\":10,\"manifestLoadingTimeOut\":1000,\"manifestLoadingMaxRetry\":10,\"manifestLoadingRetryDelay\":500}","play":"true","unload":"true","threshold":0.1,"players":["hls.js","socket.io","hls","mp4"],"x":600,"y":340,"wires":[[]]},{"id":"b56bdc0486252bad","type":"comment","z":"ca690f62.6091a","name":"========== video/test==========","info":"","x":140,"y":170,"wires":[]},{"id":"b22f4aa132581f1a","type":"ui_button","z":"ca690f62.6091a","name":"","group":"9e53dc85.2af22","order":1,"width":0,"height":0,"passthru":false,"label":"button","tooltip":"","color":"","bgcolor":"","icon":"","payload":"","payloadType":"str","topic":"topic","topicType":"msg","x":50,"y":200,"wires":[[]]},{"id":"e4b2e288f68a7d79","type":"ui_group","name":"cam","tab":"dff91963753d0f3e","order":2,"disp":true,"width":"6","collapse":false},{"id":"9e53dc85.2af22","type":"ui_group","name":"test","tab":"dff91963753d0f3e","order":1,"disp":true,"width":"6","collapse":false},{"id":"dff91963753d0f3e","type":"ui_tab","name":"video","icon":"dashboard","order":2,"disabled":false,"hidden":false}]
?
I have a dependency problem when I try to install node-red-dashboard@Beta3.0.0
PS C:\Users\vanes> npm i node-red-dashboard@3.0.0-beta
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! Found: node-red-dashboard@3.0.0-beta
npm ERR! node_modules/node-red-dashboard
npm ERR! node-red-dashboard@"3.0.0-beta" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer node-red-dashboard@"^2.26.1" from node-red-contrib-ui-mp4frag@0.1.0-beta.2
npm ERR! node_modules/node-red-contrib-ui-mp4frag
npm ERR! node-red-contrib-ui-mp4frag@"github:kevinGodell/node-red-contrib-ui-mp4frag" from the root project
however all my mp4frag package is up to date :
PS C:\Users\vanes> npm install kevinGodell/node-red-contrib-ffmpeg-spawn
up to date, audited 120 packages in 20s
PS C:\Users\vanes> npm install kevinGodell/node-red-contrib-mp4frag
up to date, audited 120 packages in 25s
PS C:\Users\vanes> npm install kevinGodell/node-red-contrib-ui-mp4frag
up to date, audited 120 packages in 12s
Did it actually install node-red-dashboard beta 3 ? Its hard to tell by the error message. The command I used was npm install node-red-dashboard@next.
damn I have the same bug
Something i don'tunderstand is in the palette i got this version :
[EDIT] and whenNR start it show :
1 Aug 17:13:13 - [info] Node-RED version: v2.0.5
1 Aug 17:13:13 - [info] Node.js version: v14.17.3
1 Aug 17:13:13 - [info] Windows_NT 10.0.19043 x64 LE
1 Aug 17:13:13 - [info] Loading palette nodes
1 Aug 17:13:14 - [info] Dashboard version 2.30.0 started at /ui
1 Aug 17:13:15 - [info] Settings file : \Users\vanes\.node-red\settings.js
1 Aug 17:13:15 - [info] Context store : 'default' [module=memory]
1 Aug 17:13:15 - [info] User directory : \Users\vanes\.node-red
1 Aug 17:13:15 - [warn] Projects disabled : editorTheme.projects.enabled=false
1 Aug 17:13:15 - [warn] Flows file name not set. Generating name using hostname.
1 Aug 17:13:15 - [info] Flows file : \Users\vanes\.node-red\flows_pc-gougou.json
1 Aug 17:13:15 - [info] Server now running at http://127.0.0.1:1880/
1 Aug 17:13:15 - [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.
---------------------------------------------------------------------
1 Aug 17:13:15 - [info] Starting flows
1 Aug 17:13:15 - [info] Dashboard version 2.29.3 started at /ui
1 Aug 17:13:15 - [info] Started flows
strange ? The Dashboard node Strart 2 times :2.30. and 2.29.3 !
And when I deactivate ui-mp4frag, I no longer have Dashboard 2.29.3
i will remove Dashboard from Palette and see ...
Ok, I uninstalled and reinstalled Node-Red,
deleted the C:\Users\vanes\.node-red folder
and there everything works with version 2.29.3 of the Dashboard, and NR 2.0.5 by default.
The joys of computing 
Thanks again @kevinGodell
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