[Koha] Critical error on Koha website

Hi When I'm trying to preview or release the current Koha newsletter I'm getting the following message: There has been a critical error on this website. I'm also getting this message when I try to access older newsletters, for example * https://koha-community.org/koha-community-newsletter-april-2022/ * https://koha-community.org/koha-community-newsletter-august-2022/ Can someone with the necessary rights and knowledge please remove this problem? 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