I just imported 2 clients and it worked great.

I have been working with Bert with proseries and he told me it was a "network_error 401" that was causing this issue.

The old QBO import function [written 25 years ago], was updated and the authentication was failing when QBO was asking for Proseries credentials to be able to import the data.

wish this had been made known months ago. I wasted about 50 hour of my time working on this issue; QBO said its Proseries error; Proseries said its QBO. Both INTUIT companies.

Intuit needs to learn to be more responsive for these type of problems. These "techs" who are reading articles are not capable of resolving this and it should immediately be elevated to an engineer that knows the code.