........after that I uninstalled the paypal module, uploaded fresh files and installed, and tested. No change. Money disappears but customer gets nothing, and no orders show up in admin.
I've read through another long thread and gone through Merlin's tutorial. Nothing they suggest has improved my situation.
The only thing I know is that port 80 is open and port 443 is unavailable.
My shop is in a subfolder.

Time to go to sleep.

I really hope no one buys anything from me before this one is fixed.