I have gotten the same error for a long time. I don’t remember the last time I logged into PB because of that error. I contacted them and still nothing.
I'm beginning to think this is selective. My account may have gotten the zot because they got a complaint about one or more of my images.
I'm still going to email them and see if I can get some help. It might just be a technical glitch. Hope so. I've got a ton of images stored there.