[Solved] PHP Warning Undefined array key "wp_lang"
Whenever there is someone on the site (most of the time), an error log is created that says: PHP Warning: Undefined array key "wp_lang" in /home/cobourgblog/public_html/wp-content/plugins/wpdiscuz/forms/wpDiscuzForm.php on line 310. New lines are created every few seconds. It seems to have started after the update to 7.4.1
I have the same issue also, shows error on mobile devices but not desktop.
Thank you. Now fixed.