Hello, I have Limesurvey 3.15.3+181108 installed. Often I get Server error 500, by whom server log contains following:
(example)

1) (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server, referer: domain.eu/index.php/admin/tokens/sa/emai...emind/surveyid/55936
2) and End of script output before headers: index.php, referer: domain.eu/index.php/admin/tokens/sa/emai...emind/surveyid/55936


or:
1) (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server
2) End of script output before headers: index.php

Does anybody know how to resolve this? Is it server problem?
Server has PHP 7.2.15, MySQL 5.7.24.

Thank you in advance -
Elita

Elita wrote: Hello, I have Limesurvey 3.15.3+181108 installed.…

Start by updating.

updated.
still the same Apache error:
End of script output before headers: index.php, referer: domain.eu/index.php/admin/responses/sa/view/surveyid/