Hi, thank you for using Intuit ProFile Community

It is unusual to receive this error if that is the only T4 and there is no self-employment income.

You should check with your CRA e-file help desk. The phone number for your area can be found at the following link:

https://www.canada.ca/en/revenue-agency/services/e-services/e-services-businesses/efile-electronic-f...

The efile help desk  should be able to tell you what is blocking acceptance of the file and how to proceed.

Hope this helps