I receive this error when trying to view the frontend of the Joomla Local Host. syntax error, unexpected token "\"

The administrator backend seems to be working correctly.

I preformed all available updates to try and resolve the issue.

I check the Apache Error Log and this is the error I keep getting [Wed Dec 30 11:21:03.447048 2020] [php:warn] [pid 8272:tid 1828] [client ::1:62532] PHP Warning: Trying to access array offset on value of type null in C:\xampp\htdocs\demo\plugins\system\helixultimate\core\classes\scss\Compiler.php on line 3624, referer: http://localhost/demo/administrator/index.php?option=com_sppagebuilder