You are absolutely right and thank you for answering anyway. I was desperate and after several days of miscommunication and all kinds of problems with Airbnb. As I finally got a confirmation for an appartment, paypal payment didn't work anymore and I freaked out. Here is what I think did the trick: First of all my paypal balance is 0,00 which normally is not a problem as I have it connected to my bank account. But somehow it didn't work anymore. I have made several payments (to Airbnb) over the last couple of days of which some where refunded, others not... I presume that this caused some kind of security algorhythm blocking payments. I clicked myself through all possible options and found some payment preferences for automatic and online purchases. I changed the one for online purchases to "bank-account" and voilà! Don't ask me how and why - I was just following my feeling.
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