To replicate: 1. Comment out or delete <listen id="biblioserver">...</listen> from your Koha config file 2. Navigate to staff client /cgi-bin/koha/about.pl 3. Observe error 500 4. Check error logs, see Can't use an undefined value as a HASH reference at C4/Context.pm line 536. Question: If you are using ElasticSearch, is it still necessary to have Zebra related configurations in KOHA_CONF? Bug appears after Bug 28306 commit 4605304f62228172be094393875625b1e9666bda
(In reply to Lari Taskula from comment #0) > Can't use an undefined value as a HASH reference at C4/Context.pm line 536. The correct line as of 442fb97155285ff4063cdd6279328ebed62ea6d4 is 534 not 536.
I'd say we move this code into the eval: my $host = _common_config($server, 'listen')->{content}; my $serverinfo = _common_config($server, 'serverinfo'); my $user = $serverinfo->{user}; my $password = $serverinfo->{password};