Hey Guys,
Sorry for all the trouble! Seems like you guys are right on track. I think the best way to handle the problem right now is to manually remove the
<IfModule mod_suphp.c>
suPHP_ConfigPath '...'
</IfModule>
section of code from the .htaccess file. Since version 6.1.9, Wordfence no longer needs, or adds, this block of code.
However, if you continue to have problems, you may need to manually remove the Wordfence Firewall, similar to what wallyO did, by following these steps: https://docs.wordfence.com/en/Web_Application_Firewall_FAQ#How_can_I_remove_the_firewall_setup_manually.3F.
You will not experience these issues after re-enabling / re-installing Wordfence Firewall. We have found other, better ways to handle servers using suPHP.
Again, sorry for the trouble. Feel free to add any information that may help us troubleshoot.
Thanks wallyO!