Fix WordPress PHP Crash

I upgraded the server’s PHP version and now the website is showing an error message

Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /home/httpd/vhosts/officezuerich.ch/httpdocs/wp-content/plugins/essential-grid/includes/item-skin.class.php on line 1321 Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /home/httpd/vhosts/officezuerich.ch/httpdocs/wp-content/plugins/revslider/includes/operations.class.php on line 2758 Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /home/httpd/vhosts/officezuerich.ch/httpdocs/wp-content/plugins/revslider/includes/operations.class.php on line 2762 Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /home/httpd/vhosts/officezuerich.ch/httpdocs/wp-content/plugins/revslider/includes/output.class.php on line 3706 Warning: Use of undefined constant HGR_XTND - assumed 'HGR_XTND' (this will throw an Error in a future version of PHP) in /home/httpd/vhosts/officezuerich.ch/httpdocs/wp-content/plugins/hgr_vc_extender/elements/hgr_xtnd_animicons.php on line 21

Your task is straightforward: diagnose whatever compatibility issue, fatal error, or mis-configured setting is blocking execution, then repair it so the site loads normally under the current PHP version (or roll it back safely if that proves the only option).

Deliverables
• Front-end restored and loading without a white screen
• WordPress admin area over Plesk accessible and error-free
I can supply FTP, cPanel, and database access immediately—just tell me what you need.