I have a problem when modifying system preferences , i tried to change a value for example "opaccredits" then i clicked "Save All OPAC preferences " button i got "Internal server error". I checked the error log and i have found this error "(2)No such file or directory: exec of '/usr/share/koha/intranet/cgi-bin/svc/config/systempreferences' failed, referer: http://10.202.2.180:8080/cgi-bin/koha/admin/preferences.pl?tab=opac ". I don't know why this file couldn't be executed although it has execute permission. Koha version usd : 3.6.5
Finally i have found the problem .In /svc/config/systempreferences it was written #!/usr/bin/perl but i have perl installed in the following path /opt/ActivePerl-5.12/bin/perl so i have changed it to the correct perl path and it worked.