Hello,
One of my clients tells me, that since a few weeks his plug-in Insert/Edit file rarely works.
The pop-up shows, but no folder tree, no files.
Strangest thing is that it works sometimes, but very rarely.
The client tried on 5 computers of his company, with various results: sometimes it works, mostly it doesn't.
The server error logs show nothing.
When I try to reproduce the issue on my own station, it works flawlessly.
My only guess is a weak internet connection on their side.
Do you have any experience with this type of problem?
Would you like to have access to admin, FTP?
Thanks in advance!

I passed it on to the client, waiting for response, I'll give it a couple of days.
Indeed, my own browser is set to delete cookies on quit.
That may be the difference why it always works normally for me.
Thank you Ryan!

Hi Ryan,
The problem seemed to be solved, but finally wasn't.
Funny thing is that the File Browser works correctly, but the File Manager doesn't.
See also the attached screenshot.
But ... when I cleaned the Joomla cache, everything was okay.
Could this be caused by JCE updates?
Thanks in advance!

Okay Ryan, thank you, I told my client to give me a call as soon as it happens again.