Error: Warning: “continue” targeting switch is equivalent to “break”.

I suddenly get this error. My PHP-version is 7.2.29 (7.3 and 7.4 also did not work).

Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-content/plugins/qtranslate-x/qtranslate_frontend.php on line 497 Warning: Parameter 2 to qtranxf_excludeUntranslatedPosts() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_postsFilter() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_excludeUntranslatedPosts() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_postsFilter() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_excludeUntranslatedPosts() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_postsFilter() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_excludeUntranslatedPosts() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287 Warning: Parameter 2 to qtranxf_postsFilter() expected to be a reference, value given in /var/www/vhosts/82/281459/webspace/httpdocs/website.nl/wp-includes/class-wp-hook.php on line 287