Well this certainly isn't related to MyBB mate.
Talk to them , though they won't give support for free hosting
Why do you need free hosting when you can comfortably install mybb on the localhost, free hosting has a ton of limitations and they can delete files without you even knowing about it!!!
how i need online card for paypal
Dude shared hosting is only $4 per month don't cheap!!!
moved as it is not related to MyBB