Regarding an issues raised across several other posts:
Dropbox installations can result in persistent system issues on Debian 13. In an attempt to save others some headache, here's a few details I found helpful while attempting to fix the issue.
- Note that Debian isn't supported by Dropbox. Here is their list of supported distros (Ubuntu & Fedora). Regrettably, I believe that means no official support for this issue.
- Dropbox installation on Debian 13 can cause issues when uninstalling and/or updating. Common remedies for this kind of issue, especially those targeted at Debian amateurs (like myself) are generally inapplicable. Trixie changed some apt features. "add-apt-repository -r" no longer works. Don't go down a rabbit hole trying to get it onto your Trixie install, it isn't meant to be there.
- Typical methods to remove or purge Dropbox won't work. They result in errors, or are ineffective. The final entry in this guide got me the best results. Applied to the dropbox issue, that meant (ls -l /var/lib/dpkg/info | grep -i dropbox) followed by (sudo mv /var/lib/dpkg/info/dropbox.* /tmp). After this, I could get purge to correctly resolve.
I hope that this saves somebody some time.