Hello,
So I'm a bit baffled by this and wasn't expecting Yoast to be the cause... anyway I recently updated to WP 4.6 and my client reported they were no longer able to save their courses.
Doing some testing the post, page, sp-faq, testimonials, bbp-forums, bp-groups all save without issue.
So far it's only the WPLMS courses (CPT) and Woocommerce products/orders that aren't saving. When I go to publish, update or save draft on these three post types I get the following screen(except saving orders the screen for that is fully blank and grey);
http://i.imgur.com/UdqJGm6.png
*The standard 500 error.
Looking into the logs I'd initially seen logs about the get_currentuserinfo function being deprecated so I resolved all of them. Now I get a memory error when I save courses;
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 72 bytes) in /home/ljlee/public_html/wp-admin/includes/template.php on line 929
*Note: When saving Products and Orders it fails but I get nothing logged.
So I was stumped at that point and was looking through all the 4.6 issues online then someone mentioned Yoast was acting up for them, at first didn't pay any mind but just finally disabled it by adding -break to the end of the folder name to kill it. This instantly resolved my saving issues for courses, products and orders.
When I re-enabled the issue came back right away, but the error slightly changed, was still a memory one but different location;
[19-Aug-2016 17:07:13 UTC] PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 2048 bytes) in /home/ljlee/public_html/wp-includes/plugin.php on line 235
Any thoughts or troubleshooting that can be provided would be greatly appreciated.
My version information;
WP 4.6
Yoast SEO 3.4.2
WPLMS(theme) 1.8.4.1
Woocommerce 2.4.4
Thanks for the help