You might see an error on the country of residence page on the IRCC website even though you have provided the current US address. To resolve this, click the 'Add' button. A pop-up will open. Select the country, dates of living in the country, and other required fields. Save and come out of the pop-up. Now, you will see this entry in the list of residences. You will now be able to 'Save and Continue' without any error.