Strange warnings on top of website

Does anybody know what’s happening here?
I get these warnings sometimes at the top of my website, anywhere. Seem to be a bug. Reloading the website in the browser heals these warning messages:

Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /home/httpd/vhosts/marisol.ch/baeren/wp-content/plugins/awesome-support/includes/functions-templating.php on line 694 Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /home/httpd/vhosts/marisol.ch/baeren/wp-content/plugins/awesome-support/includes/class-product-sync.php on line 193 Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /home/httpd/vhosts/marisol.ch/baeren/wp-content/plugins/awesome-support/includes/class-product-sync.php on line 220 Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /home/httpd/vhosts/marisol.ch/baeren/wp-content/plugins/awesome-support/includes/class-product-sync.php on line 242

PS
B?ren.net is almost cut off www (no access to proxies, and the website is only available in Switzerland, filtering foreign traffic in nginx & htaccess).

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