[JavaScript Error: "TypeError: ZoteroPane_Local.tagSelector is undefined" {file: "chrome://zotero/content/zoteroPane.js" line: 1123}]
Upload image file with the file dialog or by dragging and dropping images onto the dashed region
If so, do you get the error again if you change it back to Automatic?
If you check your database integrity from the Advanced → Files and Folders pane of the Zotero preferences, does it say there were no errors?