Hmmmm may be for some reason the octopi daemon was not started... did you try rebooting the pi? if that does not help, yeah, regenerating the SD should be good to go, it has worked for all of us here with no issues... furthermore, octopi was the only one connecting 100% of the times, repetier was 75-80%, cura was 50%....

but i guess, in the end, all was about a crap board with USB communication issues...