unfortunately, the solution is not a satisfying one. This morning, when trying @Wige\'s Suggestion, I found, to my suprise, that the Expected value
I struggled with RewriteRule issues on a 1&1 / 1and1 / IONOS shared server for WEEKS and eventually I found the perfect setup for a 1 and 1 shared server, start your .htaccess file like this
Options -MultiViews
Options +FollowSymlinks
RewriteEngine On
RewriteBase /
I hope this helps someone as 1&1 are useless when it comes to htaccess support