It will do that if payment method fails repeatedly. i.e. no funds, and the back-up funding source didn't work (if bank transfer, does the direct debit still exist etc?).
It's a signal to check your PayPal, make sure it's good, and then cancel and recreate any automatic payments you may have.
Oh Lord no. I was in the SF sunning it up and watching the US election go down.
I have set aside time this week to investigate the horrors of PayPal.