If it is your phone saying the file type is forbidden, you might need to change your download settings on your phone to allow downloads from sources other than the apple/google/galaxy store. For security reasons, by default your phone won't allow downloads from non-store locations/websites. If you search "how to install unknown apps on (apple/android), you should be able to get the game to download properly. Keep in mind, this feature it DISABLED BY DEFAULT FOR SECURITY REASONS, so you might want to turn it back on after you have the game fully running/working.