Hi, I have an error displayed on the startpage:

Warning: Undefined variable $scssVars in /home/httpd/vhosts/cornhole-aarburg.ch/httpdocs/plugins/system/helixultimate/src/Core/HelixUltimate.php on line 1914 Warning: Trying to access array offset on value of type null in /home/httpd/vhosts/cornhole-aarburg.ch/httpdocs/plugins/system/helixultimate/src/Core/HelixUltimate.php on line 1914

And it is not possible to register additional websites.

What to do?