Hello everyone, We are using Koha for our resource centre and we are getting frequent software errors while working on it. Errors are like - Error 1 : Software error: Wrong CSRF token at /usr/share/koha/intranet/cgi-bin/members/memberentry.pl line 291. For help, please send mail to the webmaster ([no address given]<mailto:[no%20address%20given]>), giving this error message and the time and date of the error. Error 2: This site can't be reached The connection was reset. Try: * Checking the connection * Checking the proxy and the firewall<data:text/html,chromewebdata#buttons> * Running Windows Network Diagnostics<javascript:diagnoseErrors()> ERR_CONNECTION_RESET Today, I got error when was working on Koha and to check something I clicked on 'Help'. I checked the Intranet error logs file and a snapshot of the same is below. The highlighted error is the error which was logged today when I clicked 'Help'. [Mon Aug 07 15:24:18.684124 2017] [cgi:error] [pid 46288] [client 72.141.68.213:49598] AH01215: [Mon Aug 7 15:24:18 2017] manage-marc-import.pl: Can't call method "results" on an undefined value at /usr/share/koha/intranet/cgi-bin/tools/manage-marc-import.pl line 347.: /usr/share/koha/intranet/cgi-bin/tools/manage-marc-import.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/tools/manage... [Mon Aug 07 17:01:11.388667 2017] [cgi:error] [pid 46753] [client 72.141.68.213:51047] AH01215: [Mon Aug 7 17:01:11 2017] additem.pl: DBIx::Class::Storage::DBI::select_single(): Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single at /usr/share/koha/lib/Koha/Objects.pm line 83: /usr/share/koha/intranet/cgi-bin/cataloguing/additem.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/cataloguing/additem.pl?op=edititem&biblionumber=55&itemnumber=60&searchid= [Mon Aug 07 17:01:42.857633 2017] [cgi:error] [pid 46763] [client 72.141.68.213:51057] AH01215: [Mon Aug 7 17:01:42 2017] additem.pl: DBIx::Class::Storage::DBI::select_single(): Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single at /usr/share/koha/lib/Koha/Objects.pm line 83: /usr/share/koha/intranet/cgi-bin/cataloguing/additem.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/cataloguing/additem.pl?op=edititem&biblionumber=55&itemnumber=59&searchid= [Tue Aug 08 03:39:01.311411 2017] [cgi:error] [pid 52495] [client 72.141.68.213:49809] AH01215: [Tue Aug 8 03:39:01 2017] detail.pl: Use of uninitialized value in concatenation (.) or string at /usr/share/koha/lib/C4/Biblio.pm line 1410.: /usr/share/koha/intranet/cgi-bin/catalogue/detail.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/cataloguing/... [Tue Aug 08 03:39:50.095831 2017] [cgi:error] [pid 52517] [client 72.141.68.213:49813] AH01215: [Tue Aug 8 03:39:50 2017] detail.pl: Use of uninitialized value in concatenation (.) or string at /usr/share/koha/lib/C4/Biblio.pm line 1410.: /usr/share/koha/intranet/cgi-bin/catalogue/detail.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/tools/upload... [Tue Aug 08 18:53:48.745776 2017] [cgi:error] [pid 63052] [client 137.122.64.13:16643] AH01215: [Tue Aug 8 18:53:48 2017] detail.pl: Use of uninitialized value in concatenation (.) or string at /usr/share/koha/lib/C4/Biblio.pm line 1410.: /usr/share/koha/intranet/cgi-bin/catalogue/detail.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/tools/manage... [Tue Aug 08 18:57:20.166232 2017] [cgi:error] [pid 63135] [client 137.122.64.13:16842] AH01215: [Tue Aug 8 18:57:20 2017] detail.pl: Use of uninitialized value in concatenation (.) or string at /usr/share/koha/lib/C4/Biblio.pm line 1410.: /usr/share/koha/intranet/cgi-bin/catalogue/detail.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/tools/upload... [Tue Aug 08 19:12:33.214782 2017] [cgi:error] [pid 63456] [client 8.28.16.254:2289] AH01215: [Tue Aug 8 19:12:33 2017] batch_records_ajax.pl: Use of uninitialized value in array element at /usr/share/koha/intranet/cgi-bin/tools/batch_records_ajax.pl line 50.: /usr/share/koha/intranet/cgi-bin/tools/batch_records_ajax.pl [Tue Aug 08 19:12:33.215002 2017] [cgi:error] [pid 63456] [client 8.28.16.254:2289] AH01215: [Tue Aug 8 19:12:33 2017] batch_records_ajax.pl: Use of uninitialized value $results_per_page in numeric eq (==) at /usr/share/koha/intranet/cgi-bin/tools/batch_records_ajax.pl line 53.: /usr/share/koha/intranet/cgi-bin/tools/batch_records_ajax.pl [Tue Aug 08 19:46:24.299851 2017] [cgi:error] [pid 64346] [client 137.122.64.13:16448] AH01215: [Tue Aug 8 19:46:24 2017] additem.pl: DBIx::Class::Storage::DBI::select_single(): Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single at /usr/share/koha/lib/Koha/Objects.pm line 83: /usr/share/koha/intranet/cgi-bin/cataloguing/additem.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/cataloguing/additem.pl?op=edititem&biblionumber=3&itemnumber=63&searchid= [Tue Aug 08 19:46:36.232888 2017] [cgi:error] [pid 64346] [client 137.122.64.13:16448] AH01215: [Tue Aug 8 19:46:36 2017] additem.pl: DBIx::Class::Storage::DBI::select_single(): Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single at /usr/share/koha/lib/Koha/Objects.pm line 83: /usr/share/koha/intranet/cgi-bin/cataloguing/additem.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/cataloguing/additem.pl?op=edititem&biblionumber=3&itemnumber=63&searchid= [Tue Aug 08 19:46:51.483374 2017] [cgi:error] [pid 64367] [client 137.122.64.13:16465] AH01215: [Tue Aug 8 19:46:51 2017] additem.pl: DBIx::Class::Storage::DBI::select_single(): Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single at /usr/share/koha/lib/Koha/Objects.pm line 83: /usr/share/koha/intranet/cgi-bin/cataloguing/additem.pl, referer: http://ilob-olbi-intra.juliencouturecentre.ca:8888/cgi-bin/koha/cataloguing/additem.pl?op=edititem&biblionumber=3&itemnumber=64&searchid= [Wed Aug 09 14:05:20.165528 2017] [cgi:error] [pid 13318] [client 199.116.173.196:43345] AH01215: [Wed Aug 9 14:05:20 2017] help.pl: Use of uninitialized value $url in pattern match (m//) at /usr/share/koha/intranet/cgi-bin/help.pl line 31.: /usr/share/koha/intranet/cgi-bin/help.pl Can anyone please suggest why these errors are occurring? Any help would be greatly appreciated because these errors are interrupting our work. Regards, Gurpreet