WHen creating a new game with a module, 'no implicit conversion of nil into String'

When I select to create a new campaign and select the module, name it, and select a character sheet, then press, 'I'm Ready! Create Game" it takes me to the campaign page as if it is set up but i get an error, " An error occured while adding  Lost Mine of Phandelver  to this game: * no implicit conversion of nil into String " and when i load the game there are no assets. What is going on here?

Fixed by clearing my cache and restarting my computer

While I'm able to create a game but I'm unable to create a copy of a game. 

Yeah I tried clearing my cache and restarting and that didn't fix it. I tried a blank newly made game with nothing in it and I get the same results.

Attempted again and seems to be solved! Thank you so much!