I figured it out after all, here is the explanation.

I already read through So, how can I configure Windows 7 to use TLS 1.2 only and check whether the setting works properly? So I'm trying to configure my Win7 to use TLS 1.2 only, and not use 1.0/1.1 at all. Since 1.2 seems to be supported by both, that is the version I want Ubisoft Connect to use. It seems the difference is that wallet supports TLS 1.0 & 1.1 but not 1.3 and the channel-service doesn't support 1.0 & 1.1, but does support 1.3. Using SSLLabs, I looked at the supported TLS versions of those websites: But maybe not, so I would like to be able to check if TLS 1.2 is configured as the only available protocol correctly - I suspect it isn't.) (HTTP status code is none? Other calls in the logfile work normally, suggesting that there is some fundamental issue with the request itself.

The logs suggest that this is related to using the wrong version of TLS, I think. The underlying issue is that Ubisoft Connect does not work properly. (Yes, I know that Win7 gets no more patches, nevermind that.) The question is about forcing Win7 to use TLS 1.2 only.

Test tls 1.2 windows 7