Issue with Shopping Cart…Not going to paypal with "oops" message

Not only are my images missing (again – see https://premium.wpmudev.org/forums/topic/after-upgrade-products-page-not-accessible#post-975672)

… but I am getting complaints about paypal orders not working.

I tried it myself and I get the same "Oops" error message.

Can someone please advise or fix.

Access is open.