BuddyPress.org

Dear all,

I had theme Agama Version 1.5.5 by Theme Vision runnig on WordPress Version 5.4.1 when I installed and activated BuddyPress, then installed and activated BuddyMeet.

When I realised than some of the menues were missing, I tried setting the BuddyPress Style from “nouveau” to “old” and it worked, the missing menues were visible.

I changed the theme to Agama Blus Version 1.1.1 by Theme Vision and set the BuddyPress Style back to “nouveau”.

When I changed the theme back to Agama again, I reveived this error on every page:
Warning: preg_match(): Compilation failed: quantifier does not follow a repeatable item at offset 1 in /homepages/5/d742650060/htdocs/app821701390/wp-includes/class-wp.php on line 223
Warning: preg_match(): Compilation failed: quantifier does not follow a repeatable item at offset 1 in /homepages/5/d742650060/htdocs/app821701390/wp-includes/class-wp.php on line 224

The lines within calss-wp.php contain:
if ( preg_match( “#^$match#”, $request_match, $matches ) ||
preg_match( “#^$match#”, urldecode( $request_match ), $matches ) ) {

I tried several simple themes, deactivated/reactivated BuddyPress and BuddyMeet, deinstalled/reinstalled BuddyPress and BuddyMeet, nothing helped.

I compared the file class-wp.php with an older version from my backup, but they are similar.

Anyone got any idea what to do?

Kind regards,
Mirko