Cant boot tails on VirtualBox

I've downloaded tails and when I boot everything goes normally until it fully boots up, at which point it shows the desktop for a second and then says "Uh Oh! An error has occured" or something similar. I've tried going to the other consoles with cntrl+alt+f4 and all of them ask for a username and password which I can't find after looking up and was never asked to enter. Im running virtualbox on windows 10. If anyone could help that would be appreciated.