Fatal errors in debug log file

I am having major issues with this Wordpress theme…. Can you please please assist. This site has to be ready by Wednesday and the latest. I am in the final phases and have exhausted my resources. The last 3 support sessions with Woocommerce demanded I to contact the theme developer. There is an issue with a plug-in I was trying a few weeks back. It didn’t work with my page form so I deactivated it and deleted it but still seems to be lingering in the system. Thank you and I really really hope ANYONE can assist ASAP.