I'm having issues with several accounts where a red arrow shows next to a transfer account's name, and if I click that arrow, an error message pops up saying "This transaction has one or more invalid transfers."
However the account name exists and is correct, as you can see in these screen shots.
If I click there arrow in the transfer dialog box and scroll down to the account name and select it, when I return to the transaction the transfer field is blank.
The only way I can get this to work is to select different transfer account, save the transaction, go back, and fix it. Then it stays.