XF 2.0 Admin cp suddenly cannot be found

[Alternadiv]

I was literally just in the ACP a minute ago and now I tried to go back in and it says oops the page cannot be found.

 

[KSA]

try this and see if it takes you there

[URL="http://www.example.com/admin.php?[/URL]"]www.example.com/admin.php?[/URL]

 

[Alternadiv]

It came back on its own without adding the question mark. I wonder why it would have done that?