2.12.1. Unsupported options
The cause of error 500 on the site may be the presence in the file .htaccess unsupported parameters. Check the contents of this file and, if necessary, make the appropriate changes to it:
Options +FollowSymLinks— needs to be replaced with
Options All -Indexes- needs to be replaced with
+ExecCGI- you need to delete.
AllowOverridewith any parameters — you need to delete.
The hosting does not use the Apache module
mod_version, so if in .htaccess there are blocks with directives
IfVersionthey should also be removed, leaving only the contents of the Apache 2.4 blocks.
Also on the hosting you cannot use
RewriteMap... If the goal is, for example, to transform URL in lower case, it is better to solve this problem by adding the appropriate directives directly to the PHP scripts of the site.