I have an error of 'incorrect exchange account' when trying to connect to a Profit-Sharing service.

This error is appearing because Profit Sharing is only available with a Zignaly Exchange account,

If you would like to connect to a Profit-Sharing service, you will need to Create a Zignaly Exchange Account and make a deposit.
This article will guide you through these simple steps: Quick Start Guide

For any more information on Profit-sharing please review Understanding Profit-Sharing