Followup of bug 19669 Link for reports/itemtypes.plugin is still in staff:/cgi-bin/koha/reports/reports-home.pl with the name "Catalog by itemtype" Which causes a 500 error.
I pushed commit 7140a5e4ecc68759c1bee04571386f9cc9a16d92 Bug 19669: (QA follow-up) Remove itemstypes.plugin but it was a mistake, I am going to revert it.