Fixed with https://github.com/LimeSurvey/LimeSurvey/pull/3927/files

@tibor.pacalat : I just test it on an Apache server showing a 500 error before, after a clean 403.

But i already review …

@DenisChenu Is it a Apache 2.2 or 2.4 server that causes the problem? Which file causes the problem? If you let me know I'll test.

In upload/surveys/.htaccess there has been an additional if/else path querying, if the mod_version module is available.

The new .htaccess file are written in a form, that the version module must be present. It does not change the behaviour, of Apache when mod_version is enabled, so it could be a pre-requisite without any side-effects, alternatively an additional guessing like in upload/surveys/.htaccess could be added in all .htaccess files.

@jweberhofer your fix fix the issue :) with apache 2.4 without