Please see the “Results” tab. Log messages which provide information about the scan are shown there. Error Messages are only shown for severe problems.
For what it is worth, I suspect you configured the scan task without providing a credential for the target. Credentials are used to authenticate to the target of the scan, which allows the scanner to identify much more vulnerabilities.
For an unauthenticated scan, a report similar to yours can be quite normal for a reasonably up-to-date target.
For more information on authenticated scans see 10 Scanning a System — Greenbone Enterprise Appliance 22.04.13 documentation.