Cannot sign in to Dropbox desktop app on new Windows laptop

I'm having trouble getting Dropbox to work on a customers device. It's a brand new Win11 laptop. 

They have a business-subscription with several seats, of which they are the administrator. I can log in to the Web Portal without issues. Installing and signing in into the app from other devices also works. 

Whenever I try to sign in to the app on that laptop, it appears to try to log in before it suddenly restarts itself and is logged out again, just long enough for the Dropbox folder to be added in windows explorer, without contents. When I click on "Open Dropbox" in the login page, Dropbox sometimes gives me the error "Couldn't complete sign in. Please try again.", however I'm unsure if this is actually related. 

I have tried to follow these troubleshooting steps already:

• Performing an advanced reinstall according to the guide provided by Dropbox
• Setting fully reset, blank MS Edge as default browser, so the login page opens there instead
• Resetting the account password
• Deleting duplicate entries of registered devices
• Uninstalling the app (with extra steps according to advanced reinstall) and installing the MS-Store-version instead

 

I'm at my wits end. I'd hate to have to try to reset the device entirely only to face the same issue again. 

Kind regards