Hello, Still troubleshooting this but my knowledge of Plack is minimal so I'm hoping someone in the community will have some insights they're willing to share. After a release upgrade to *Ubuntu 22.04.5 LTS* and Koha upgrade to *25.05.00.000*, the following is returned in the Server Information overview: "PSGI: Koha is running in CGI mode. This is a security issue! Run Koha using Plack for CSRF (cross-site request forgery) protection. More information: koha-plack --help" the plack-error log, I have the following: Array found where operator expected at /usr/share/koha/lib/Koha/Patron.pm line 2356, near "zip6 @" (Do you need to predeclare zip6?) "my" variable $self masks earlier declaration in same scope at /usr/share/koha/lib/Koha/Patron.pm line 2469. Error while loading /etc/koha/plack.psgi: syntax error at /usr/share/koha/lib/Koha/Patron.pm line 2356, near "zip6 @" Global symbol "%attribute_changes" requires explicit package name (did you forget to declare "my %attribute_changes"?) at /usr/share/koha/lib/Koha/Patron.pm line 2364. Global symbol "$is_different" requires explicit package name (did you forget to declare "my $is_different"?) at /usr/share/koha/lib/Koha/Patron.pm line 2369. Global symbol "@new_attributes" requires explicit package name (did you forget to declare "my @new_attributes"?) at /usr/share/koha/lib/Koha/Patron.pm line 2396. Global symbol "$self" requires explicit package name (did you forget to declare "my $self"?) at /usr/share/koha/lib/Koha/Patron.pm line 2437. syntax error at /usr/share/koha/lib/Koha/Patron.pm line 2441, near "}" Can't use global @_ in "my" at /usr/share/koha/lib/Koha/Patron.pm line 2452, near "= @_" Global symbol "$self" requires explicit package name (did you forget to declare "my $self"?) at /usr/share/koha/lib/Koha/Patron.pm line 2453. syntax error at /usr/share/koha/lib/Koha/Patron.pm line 2455, near "}" Can't use global @_ in "my" at /usr/share/koha/lib/Koha/Patron.pm line 2469, near "= @_" /usr/share/koha/lib/Koha/Patron.pm has too many errors. Compilation failed in require at /usr/share/koha/lib/Koha/ILL/Request.pm line 47. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/ILL/Request.pm line 47. Compilation failed in require at /usr/share/koha/lib/Koha/ILL/Requests.pm line 23. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/ILL/Requests.pm line 23. Compilation failed in require at /usr/share/koha/lib/C4/Circulation.pm line 48. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Circulation.pm line 48. Compilation failed in require at /usr/share/koha/lib/Koha/Items.pm line 27. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/Items.pm line 27. Compilation failed in require at /usr/share/koha/lib/Koha/ArticleRequest.pm line 26. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/ArticleRequest.pm line 26. Compilation failed in require at /usr/share/koha/lib/Koha/ArticleRequests.pm line 25. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/ArticleRequests.pm line 25. Compilation failed in require at /usr/share/koha/lib/Koha/Patrons.pm line 26. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/Patrons.pm line 26. Compilation failed in require at /usr/share/koha/lib/C4/Budgets.pm line 24. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Budgets.pm line 24. Compilation failed in require at /usr/share/koha/lib/C4/Biblio.pm line 90. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Biblio.pm line 90. Compilation failed in require at /usr/share/koha/lib/Koha/Biblio.pm line 28. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/Biblio.pm line 28. Compilation failed in require at /usr/share/koha/lib/Koha/Biblios.pm line 24. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/Biblios.pm line 24. Compilation failed in require at /usr/share/koha/lib/Koha/Libraries.pm line 24. BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/Libraries.pm line 24. Compilation failed in require at /usr/share/koha/lib/C4/Koha.pm line 27. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Koha.pm line 27. Compilation failed in require at /etc/koha/plack.psgi line 29. BEGIN failed--compilation aborted at /etc/koha/plack.psgi line 29. Child process 4895 exited with status 255 == Other details: perl --version: "This is perl 5, version 34, subversion 0 (v5.34.0)" mysql --version: Ver 15.1 Distrib 10.6.22-MariaDB All required perl modules are installed according to About Koha -> Perl Modules. Output from koha-plack --status is this when run as an ordinary user: *koha-plack --status <instance>WARNING: koha-plack requires some Apache modules that you are missing.You can install them with: sudo a2enmod headers proxy_http Permission denied: /etc/koha/sites/<instance>/koha-conf.xmlPermission denied: /etc/koha/sites/<instance>/koha-conf.xmlfailed to load external entity "/etc/koha/sites/<instance>/koha-conf.xml" * Plack running for <instance> * But when run as sudo I have: *sudo koha-plack --status <instance>[sudo] password for systems: * Plack running for <instance>* This makes me think there's a permissions issue, but so far I don't see where that could be. Also, the php modules "headers" and "proxy_http" are definitely installed and enabled. Thanks and all the best, Chris