"Dropbox has encountered problems joining the team and will have to re-sync your files."

Hey MB_78, I’m sorry to hear about this. 

Did you restart your computer and Dropbox app and you’re still receiving the same errors? 

If you are, can you send me a screenshot of what you see, so that I can take a look? 

I'd also like to know the OS version of the computer you're using.

Let me know how it goes.

I restarted both. That's what i get:

I'm using windows 11 Pro.

Same problem here!

Thanks for giving that a go. In this case, I recommend following these steps next to fix the permissions on your device: 

1. If Dropbox is running:
   • Click on the Dropbox icon in the system tray
   • Choose "Exit"
2. Press the Windows Key + R (at the same time) then type "cmd" and press enter to open the Command prompt.
3. Copy and paste the following lines into the Command Prompt, one at a time, and press RETURN after each one. PLEASE make sure you copy and paste these commands(don't type them by hand), as getting them wrong could cause some harm. Also, you can only paste them by right clicking and selecting “Paste”. Don't worry if one of the instructions below fail or you can't find the folder in one of these locations. This is normal.
   
   

icacls "%HOMEPATH%\Dropbox" /grant "%USERNAME%":(F) /T

icacls "%HOMEPATH%" /grant "%USERNAME%":(F)

icacls "%APPDATA%\Dropbox" /grant "%USERNAME%":(F) /T

icacls "%LOCALAPPDATA%\Dropbox" /grant "%USERNAME%":(F) /T

If you have any questions before you do this, or if you see an error after running one of these commands, please let us know!

4. Restart Dropbox from Start -> All Programs. Please also restart your computer.

Let me know, if that helps.

That didn't help. Still got the same errors.

Do you have any files from the Dropbox folder currently open on your computer? If yes, please close all of them and restart both the Dropbox app and your computer once more. 

If this doesn’t work either, please reinstall the app as the next step.