You’ll need to check the server error log to find out why exactly you are getting error 500, but commonly its memory related, esp with WooCommerce.
http://codex.ww.wp.xz.cn/Editing_wp-config.php#Increasing_memory_allocated_to_PHP
Thanks, Mike! I tried everything today… the server log wasn’t showing the error… so I had the hoster increase the php usage to 128M, and then i changed the wp-config to define the limit at 128M… and I’m still getting the 500 error. The submission process allows you to click the ‘preview’ button, but when you click the ‘choose package’ button, it hangs up for about 2-5 minutes, then crashes.
I’m using the Jobify theme; when i swap to the Twenty Thirteen theme, I can make it work. I’ve gotten the Jobify theme to not crash to a 500 error, but now it breaks the navigation and refuses to load the WP Job Manager content after I click the ‘choose a package’ button.
Wow. It wasn’t what I thought at ALL. Turns out it was the logo image attached to the job that was hanging up the process. Not sure why yet, but at least I know the problem! Thanks for all of your help!!