[5.0 beta] "Duplicate item" does not work

LiborA

I am using beta 128 and it is unable to duplicate item in this version.

EDIT: I cannot add new item manually too, so I have restarted Zotero and now it works (duplication and add manually)

dstillman

When something like this happens, be sure to submit a Report ID before restarting so we can see what the error was.