You are seeing the below error message on your Sync App while trying to connect a company to Sage 50 US.
Connection to the company could not be established. Unable to Connect to Sage 50 US Company File. Error : Company not Found
Sage 50 US users.
AutoEntry Desktop Sync App.
The Sage 50 US integration is only available for Sage version 2021 using Accruals based accounting.
If this company is set up on a cash basis, AutoEntry will unfortunately be unable to integrate.
A full guide on connecting your AutoEntry company with Sage 50 US can be found here.