Invalid charge method, bank says it’s okay.

My uncle just moved here, and I open him an Amazon seller central, all documents are good, but when he logs in, it says Invalid charge method. I checked his bank, it gets charged, says pending but a few hours later it disappears.

Anyone else have this problem? I talked to his bank and they say it’s not on their side so it’s on Amazon. Anything I can do to finalize his account so he can start selling?