Main Menu black and grey, Also not responding

Im trying to make a main menu at the start of the game, with simple buttons and all. Everytime i test it, in the view port it wont show. but in the standalone, it will show black and grey, and will not respond to mouse input (such as clicking and hovering)
PLease Help ASAP!!

I think I did something with the settings, because I deleted the old one, and made a whole new project (Migrated the levels i had off course) and now it seems to work. Took some time, but i did it all over again.