My website has stopped functioning partly. I’m getting HTTP 500 error or Internal Server Error. The homepage is online but internal pages show the error message or photos are not loading. I cannot log in to the site. It started with wordfence giving me a warning that two plugin updates contained malware but warned that might be a false reading. I deleted the flagged file on the first plugin and then the white screen came up. The plugin was W3 total cache. Can you help?