What is on console?
Also check by executing,
bench clear-cache
bench build
What’s there on browser console log?
Failed to load resource: the server responded with a status of 404 (NOT FOUND)
It seems like a css issue.
Try
'bench update --build'
I fully restored the site just to figure out what caused the issue.
I did not update the system but updated the css & js files
bench build caused the same issue
So the problem is caused by css or js files.
I restored the system again
did bench update which broke the desktop again.
Now, I am planning to do something more radical. Like install the updated system then restore files.
bench update --build
It will buil css and js
Not update your system
So, no risk in runnig this command
For more help, run
bench --help
bench update --help
Sadly,
I was trying to show notifications on login screen which I made lots of changes on bootstrap and login pages (html and css).
So the problem was me. The way to recover is to create a changelog and keep the original files.