We are also getting this error. It has shut down our publishing business. We are NOT on a strange network. The same script on the same network recently stopped working. We tried --list-providers and it shows no problems. xcrun altool --notarize-app --primary-bundle-id "????" --username "????" --password "????" --file "????" 2020-12-24 12:24:48.948 altool[10772:448247] CFURLRequestSetHTTPCookieStorageAcceptPolicyblockinvoke: no longer implemented and should not be called

We have the same problem. This line used to work fine: xcrun altool --notarize-app --primary-bundle-id "????" --username "????" --password "????" --file "????"