Hi,
1) Internal server errors (error 500) are generic errors and often caused by plugin or theme function conflicts, so if you have access to your admin panel, try deactivating all plugins. If you don’t have access to your admin panel, try manually resetting your plugins. Please refer following guide to deactivate all plugins:
https://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F
If that resolves the issue, reactivate each one individually until you find the cause.
2) If that does not resolve the issue, try switching to the Twenty Fifteen theme to rule-out a theme-specific issue. If you don’t have access to your admin panel, access your server via FTP or SFTP, navigate to /wp-content/themes/ and rename the directory of your currently active theme. This will force the default theme to activate and hopefully rule-out a theme-specific issue.
Thanks,
I realized I had another membership plugin. deleted it, now I don’t get the error messages. (so far)
Thanks!
Spoke too soon, still having issues, even after deleting the membership pliugin