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In case of password change on the original TeamCity(TC) it is mandatory to manually reset (cached) credentinals credentials inside TC Bot.
TC bot caches old password data and use it to trigger new builds (.
TC data upload is background process so viewing data is available with outdated credentional):credentials.
To reset credentials click on your user user at top rigth corner:
and then to Reset Credentials button
This action will trigger logout from TC bot.
Enter username and new password.