Not getting any help from GF Support, so trying here. After updating to the latest Gravity Form plugin update, we are getting this error at the top of every page;
Deprecated: File /home/customer/www/staging3.ntunemusic.com/public_html/wp-content/plugins/gravityforms/includes/libraries/gf-background-process.php is deprecated since version 2.9.8! Use /home/customer/www/staging3.ntunemusic.com/public_html/wp-content/plugins/gravityforms/includes/async/class-gf-background-process.php (Gravity_Forms\Gravity_Forms\Async\GF_Background_Process) instead. in /home/customer/www/staging3.ntunemusic.com/public_html/wp-includes/functions.php on line 6121
Warning: Cannot modify header information - headers already sent by (output started at /home/customer/www/staging3.ntunemusic.com/public_html/wp-includes/functions.php:6121) in /home/customer/www/staging3.ntunemusic.com/public_html/wp-includes/functions.php on line 7168
No idea why, but I have had to revert back to an earlier backup of the website to remove the error. Error makes it impossible to login to WordPress. The login page disappears and only the error remains.
Thanks if you have any ideas.