Joey Piccola replied to the topic WMF 5.1 Upgrade – Broken Repositories in the forum General PowerShell Q&A 1 week, 1 day ago
I also just hit this issue on a group of servers with hardened crypto settings (i.e. SCHANNEL). Not only did I need to re-enable TLS 1.0 Client but I also had to re-enable the SHA hash. Note, my issue was not specific to a 5.1 upgrade, my issue was on 5.0.