Critical error after upgrade PRO

HI, after last upgrade to PRO my website https://www.riosa.com stopped working. The browser complains only with “Critical error on your website”.

PHP logs shows the following:

Got error ‘PHP message: PHP Fatal error: Uncaught Error: Call to undefined function wp_filter_content_tags() in /var/lib/wordpres
s/wp-content/themes/pro/cornerstone/includes/views/partials/text.php:107\nStack trace:\n#0 /var/lib/wordpress/wp-content/themes/pro/cornerstone/includes/utility/helpers.php(1165): include()\n#1 /var/lib/wordpress/wp-content/themes/
pro/cornerstone/includes/utility/helpers.php(1178): cs_render_view()\n#2 /var/lib/wordpress/wp-content/themes/pro/cornerstone/includes/utility/helpers.php(1191): cs_get_view()\n#3 /var/lib/wordpress/wp-content/themes/pro/cornerston
e/includes/elements/definitions/text.php(51): cs_get_partial_view()\n#4 /var/lib/wordpress/wp-content/themes/pro/cornerstone/includes/classes/element/class-element-definition.php(496): x_element_render_text()\n#5 /var/lib/wordpress
/wp-content/themes/pro/cornerstone/includes/classes/element/class-element-definition.php(478): Cornerstone_Element_Definition->render_one()\n#6 /var/lib/wordpress/wp-content/themes/pro/cornerstone/includes/cl…’

Disabling all plugins and deleting cache does not help.
PHP settings and MySQL are the recommended ones.

Hi @fakehec,

Can you advise what version of WordPress you’re using? We can only support the last two major versions (5.7 and 5.8). The wp_filter_content_tags function was added in WordPress 5.5, so that error would suggest you might be using a version older than that.

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