In the newest version of Zotero, a user can no longer drag the window around the screen like one could in the past. The bug is a tad annoying when it comes to copying information from another window.
I'd start with the version numbers, though -- there was an old error that did cause this that has since been fixed. I suspect you're just not updating successfully.
can't tell you why you can't update, but that's an old version. You can simply update by re-installing from zotero.org/download (which does exactly the same as re-install, i.e. leaves all your data in place)
Upgrade Storage
There is no error ID because the inability to move the window around isn't indicated as an expressed error.
I've tried to update but preferences tells me that the application is up to date.