I mean yeah I guess a bug is clearly mildly infuriating. But it’s also a bug. And the way your title is phrased, it’s like PayPal is intentionally preventing you from removing your card. Which it doesn’t seem to be pointing to here. Like I could imagine if they don’t want to let you have no cards on your account without completely closing the account. But the message would say something like that. Like "you’re required to have at least one valid card on your account. " The message isn’t just going to say something went wrong. That’s just telling you that a bug happened and you may need to contact customer support to resolve it.