read the htaccess file and see what modules it requires
as a test, rename the file or just delete it, clear cache, memcache, cookies and see if you still get the 500 error
usually a 500 error is obtain when the server is not configured properly
modules required, apache2.conf editing, and so on
as usual make sure the script is properly installed, configed and directories chmoded
edit:
https://github.com/Bigjoos/U-232-V5/...ster/.htaccess
what symbol ?