Gateway credential invalid Sharepoint

The error message you're receiving suggests that the credentials you're using to connect to the web font are invalid. This could be due to a number of factors, such as incorrect login credentials, an expired token or certificate, or a misconfiguration of the data source.

To resolve this issue, I recommend that you double-check your login credentials and ensure that they are up-to-date and valid. You may also want to try generating a new token or certificate, if applicable. Additionally, make sure that your data source configurations are correct, including any authentication settings and connection strings.

If the issue persists, you may need to investigate further to determine the root cause of the problem. This could involve reviewing log files, consulting with technical support, or seeking advice from community forums or online resources.