Cannot post purchase receipts or invoices

I’m having trouble trying to submit a purchase receipt for a test transaction. It keeps asking me for a supplier for and advance account, but I don’t see a place to enter this except on the initial opening balance area. we have already added the test supplier there but it still gives this error. Where else should I look to resolve this?

There should be Account detail section in this document to change the about it should hit in the accounting ledger.
Looks like you have assigned a custom accounting head to this supplier.
Create a new supplier and just keep the accounting head as default and try to do the same transaction. It should work.

Yeah, I went to investigate and the account type was set as a liability instead of receivable not billed. Once I changed that, it worked. Thank you.