External exception E0434352 error when using Auto-fill My Return (AFR)

If ProFile generates the error External exception E0434352 when attempting an Auto-fill My Return (AFR) for a T1 return, try changing the default web browser to Internet Explorer.

Change the default web browser

1. Exit ProFile and open the Windows Control Panel.
2. In the top-right corner, enter the search term default programs.
3. Select the Default Programs option from the search results.
4. Select the Set your default programs option.
5. Select Internet Explorer.
6. Select Set this program as default.
7. Select OK.

The error should no longer occur.