Hello jessymarco,
The 500 error it is very general and can be a lot of things, It’s not clear to me, please let us know, did you checked for a conflict with another plugin like my colleague Bojan described above?
If you haven’t done the test, please deactivate all other plugins and test again
Now enrollment process didn’t work
On my test site the user registration went smoothly, with no errors.
Would you please enable WordPress debugging by putting the following to the wp-config.php file:
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );
Repeat users steps and try to register and enroll for a course. This way all errors will be saved in the debug.log file inside the /wp-content/ directory.
Let us know if you see any errors there.
Kind Regards,
Nastia