I have your answer, but that blog post, which is a draft now and mentions the fix, is not one I am "allowed" to post yet (The 0x80072F9A We Start From).
The error you got belongs to this error message: ERROR_WINHTTP_CLIENT_CERT_NO_ACCESS_PRIVATE_KEY
Which is indeed a weird one ....
Please reach out to me on Teams so we can discuss this issue. How many devices are impacted?