Quote Originally Posted by mc12345678 View Post
Which files were loaded? Have a feeling that not the ones from github where would suggest using the 1.5.8 files etc for the version specific files.

Otherwise please provide error log info while obscuring admin directory information.
FYI, I applied the functional changes of the github version for 1.5.8 against a new 2.0.0 system and other than the admin menus generating deprecation messages once per session, had no issue with installation. I didn't attempt full configuration, but that's to follow after incorporating the appropriate admin header calls in the admin screens.