Thanks Florian and Yves for your replies.
I'm definetely no perl (and not even linux) expert.
All I have to offer as additional info i sas follows:
Full apache log for error:
[Fri Jun 24 08:41:05.797341 2016] [mpm_prefork:notice] [pid 2707] AH00163:
Apache/2.4.18 (Amazon) mod_perl/2.0.7 Perl/v5
Hi!
I've very beginner with OTRS, and zero knowledge on Perl.
-> OTRS 5 patch 10 on OEL 7 x64, MariaDB database.
I've a Customer created with several (180) tickets on it from about 4 users.
All of users are associated with a Customer ID from day zero.
Now, I've created a group "CustomerPorta
