Hi As written on this list on 26 August I tried to install Koha 21.05.03 but after the installation Koha said the installed version was "21.05.02.003". Jonathan Druart wrote this comes from commit 8ea80995c590dad86c43df636456640d3aa84bab Increment version for 21.05.03 release -$VERSION = "21.05.02.002"; +$VERSION = "21.05.02.003"; Today I updated a Koha 18.11.05 database into this Koha 21.05.02.003 installation. After restarting memcached I executed "sudo koha-upgrade-schema instancename" - the output looked OK and ended with the following lines: Upgrade to 21.05.02.000 done [12:15:20]: Koha 21.05.02 release Upgrade to 21.05.02.001 done [12:15:20]: Bug 28567 - Set to NULL empty branches fields Upgrade to 21.05.02.002 done [12:15:20]: Bug 28813 - Update delivery_note to failure_code in message_queue Upgrade to 21.05.02.003 done [12:15:20]: Bug 28872 - Update syspref values from on and off to 1 and 0 It seems even if I installed Koha 21.05.03 it only upgraded to Koha 21.05.02. I don't know if there is any connection but whatever, I was able to open the staff client and to login - but as soon as I click on any link I'm logged out immediately. I am able to login again and then advance to the next link but then I'm logged out again etc ad infinitum. It is not possible to change any system preference (internal server error) or search for any users. File "plack-error.log" sometimes tells me, without a timestamp: new(): failed: query object HASH(0x555f47cfad30) does not support cookie() and param() methods: Can't call method "cookie" on unblessed reference at /usr/share/perl5/CGI/Session.pm line 707. File "plack-intranet-error.log" says: [2021/09/02 13:33:36] [WARN] Odd number of elements in anonymous hash at /usr/share/koha/intranet/cgi-bin/catalogue/search.pl line 577. Can anyone please give me a hint how to solve 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