Update 2020-W50-1: haven't connected to PIA for several weeks now. May be dead. Using native client on a more modern platform and it works ok. Would like to have a linux computer that can be maintained off network another time.
Was 2020-W18-3:
On my CB3-131, had a lot of trouble getting PIA working. Hopefully this saves some people some time. This is the configuration I went with:I used my username from the user portal and password from generated from portal.
I pulled the pre-shared key from : https://www.privateinternetaccess.com/pages/client-support/windows7-l2tp which is currently mysafety
I could not get the certs to work with openVPN, could not get the certs to work with L2TP/cert. So I had to fill in the strings into the settings page manually.