Starting on November 21, gmailify is not able to connect to my Comcast account to retrieve my messages to gmail

It complains that "Username and password don't match.".

I have verified that the password is correct.  I have unlinked in gmail my xfinity account and add it back with the same result (Username and password don't match.)

Gmail alerted me that the connection was not working and that I needed to provide a new password, even though I have not changed recently.

Busy with thanksgiving I let it go until now, hoping that it would be fixed automatically as I have not done any changes in gmail and/or xfinity emai.

Finally, I started looking into this today.  In gmail I provided the password, but it complained still that "Username and password don't match.".  Tried several times with the same result.

So, I tried:

- Unlink in gmail my xfinity account, change the xfinity password, sign off from xfinity, login back with the new password successfully, and then tried to add my xfinity account again in gmail,  but it failed with the same error (Username and password don't match.)

- Unlink in gmail the xfinity account, uncheck "third party access security",  leave it off for a few minutes, then enable "third party access security", and tried to add my xfinity account again in gmail, that seemed to work, it did not complain about the username/password mismatch, I waited 12 hours, but none of the messages were retrieved, when I tried to unlink in gmail my xfinity account and linked it again, it fail again with "Username and password don't match.".

Please advise.