Facebook Add "Boost unavailable"

On my page when I post it says boost unavailable but I don't know how to fix it. There isn't anything wrong with my card details or nothing has changed

 

Your Facebook Ad account working well?

 

Are you talking to me ? If so everything works on my account except for now it won't let me boost posts

 

Ya, you only.
So, you are unable to boost anything? Maybe something wrong with your Ad Account if thats the case. Or else read here for more details -
https://www.facebook.com/business/help/1575107409431290

 

It says boost unavailable and that they can't receive payment from my payment method but there is nothing wrong with my payment method. I contacted the bank and there is no problem at their end.

 

Maybe Facebook doesn't accept that card or your payment method? Try some other card or bank etc.

 

I've been using that card no problem for months though

 

Try to update your payment method. I had such problem and update helped.