The update could not be installed. Please make sure there are no other copies of Zotero running on y

alephpi

I'm encountering this issue on my Deepin 20.8 system (linux distribution). I know that there are already many similar issues on the forum. But my Zotero was installed from tarball as suggested in the download page.

dstillman

That likely just means Zotero doesn't have write permissions for its installation folder. The installation files need to be owned by your user, not root, in order to be updatable by the program itself.

On a Debian-based system, you may want to just use the zotero-deb package:

https://www.zotero.org/support/installation#linux

alephpi

indeed, before this error message occurs, the permission error occurs also. (i install it in opt/zotero)