Hi Jonathan
Recreate against master, please open a new bug report. This is very weird, I did not manage to find why this tab causes problem. Did you find another one?
Thanks! I created the following bug: * https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=17660 I remember having this problem before already (Koha 3.18) but I was solving it then using the editor. When meeting an error the first time I always think I have done something wrong myself... If I'll find other tabs with this behaviour I will add notice about them to bug 17660. Best wishes: Michael -- Geschäftsführer · Diplombibliothekar BBS, Informatiker eidg. Fachausweis Admin Kuhn GmbH · Pappelstrasse 20 · 4123 Allschwil · Schweiz T 0041 (0)61 261 55 61 · E mik@adminkuhn.ch · W www.adminkuhn.ch