Update 1.9.2 – critical error and site down

When updating to your new version I got immediately after the update critical error for our wordpress site. We had to revert it back to the previous version. We don’t run WP 5.6 because we are waiting for some theme fix so we are at 5.5.3. Still, this error must be fixed, it’s just impossible to use our site after the update.

Sample of the errors below:

xxx.93.229.12:24584] mod_fcgid: stderr: #7 /home/xxx/public_html/wp-includes/plugin.php(478): WP_Hook->do_a in /home/xxx/public_html/wp-includes/link-template.php on line 375, referer: https://www.xxx.com/articles/news/firewatch-has-sold-half-a-million-copies/?wpfpaction=add
[Fri Dec 18 20:41:09.791289 2020] [fcgid:warn] [pid 20800] [client xxx.88.134.12:23322] mod_fcgid: stderr: PHP Fatal error: Uncaught Error: Call to a member function get_page_permastruct() on null in /home/xxx/public_html/wp-includes/link-template.php:375, referer: https://www.xxx.com/wp-admin/post.php?post=340649&action=edit
[Fri Dec 18 20:41:09.791320 2020] [fcgid:warn] [pid 20800] [client xxx.88.134.12:23322] mod_fcgid: stderr: Stack trace:, referer: https://www.xxx.com/wp-admin/post.php?post=340649&action=edit
[Fri Dec 18 20:41:09.791324 2020] [fcgid:warn] [pid 20800] [client xxx.88.134.12:23322] mod_fcgid: stderr: #0 /home/xxx/public_html/wp-includes/link-template.php(337): _get_page_link(Object(WP_Post), false, true), referer: https://www.xxx.com/wp-admin/post.php?post=340649&action=edit

Thank you.