Hello there,
Windows do not fully support TLS 1.3 yet. Some versions are supported, but you'll need to upgrade your Windows to the available version if you want to try it out. As this occurs only in TLS 1.3 you can try to set the trace configuration to the WCF service. Then we can catch the more detailed error message. That will help us to find the root issue.
Meanwhile, you can look into this thread with a similar discussion.
How to enable Tls version 1.3 for both WCF service and WCF client application https://learn.microsoft.com/en-us/answers/questions/951823/how-to-enable-tls-version-13-for-both-wcf-service.html
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