Error message for new web based interface: Invalid 'itemKey' value ','.
this is the message I got when I click on the a record.
Error
Received error from Zotero server: Invalid 'itemKey' value ','.
Error
Received error from Zotero server: Invalid 'itemKey' value ','.
What OS and browser are you on? Is this your personal or a group library?
Is this every time you click on any item from the list, or are there more detailed conditions?