Hi Martin,
I just did a bit of testing on the AAPK checkout system. The only PayPal account integration that was not working that I tried was yours
Upon checkout attempt, I was forwarded to a PayPal hosted page that said "Things don't appear to be working at the moment. Please try again later."
I don't know if this will resolve itself if we "..try again later" or not, but I don't think it's an AAPK error as PayPal indicated.
I'll look into things further to see if I can figure out a fix.
Best,
Bryan