how to watch uverse on windows 10

I try to watch content on my windows from the network website and after signing in it gives me "Error details

An error occurred fulfulling the current request to https://zlp43257.vci.att.com/sps/authservice/authentication.

This error was caused by an internal/unexpected error on the invoked protocol module leading to the exception displayed below.

Please validate configuration of the executing protocol and environment.

This is not a problem with the SPS. " or some networks say they can not contact the network provider.

I have had this problem for 5 months and get no where on the phone with support. Changing passwords, etc. No online locked content at any network websites live or previous broadcast. Many just say your package doesn't include this. Just got on the phone again and they keep talking about my uverse app on my phone which only allows me to set dvr recordings. So 7 more long months and I will say good bye to att uverse.