In case this is of any help to people here, I just joined artistnetworktv, and also had problems accessing content. I found a way that works, at least for me:
Log in to your account, and go to your dashboard.
On another tab, go to https://www.artistsnetwork.com/store...sts-network-tv
You can browse/search for a video. When you find it, copy part of the title, or author. The links will not work.
Go to your dashboard, and search for the video using the title or author. When you find it, click on "view now". You can then either watch it now, or you can come back later as it will be added to your dashboard.
Not very nice, but it works (for me). A lot of the videos I joined for seem to be "workshops" that cost extra.