After installing and configuring core tweaks. It blanks out on pages when I am confirming other configuration changes. For instance, if I deactivate a plugin, the screen redirects to a blank white screen. If I log out and try to log back in, the Login page is not available. there is no error message, just a white page. I had to delete the site (it was a dev site) and start over because there was no way to access the back end of the site.
Any help or guidance you can provide would be appreciated.