Each year should have the REPAIR UPDATES options listed under them in the Windows Programs/Apps menu.  Thats what I would try first.   I dont have the older years installed here at home, but this is what it looks like for 2021.

If repair updates doesnt fix it and these instructions dont either, then I guess calling support is your next step https://accountants.intuit.com/support/en-us/help-article/login-password/unable-validate-online-cred...