Workspaces Web -- Not Workspaces

I am trying to create a workspace web setup with min 3 users for testing purpose and trying to connect through url but getting error. I have used OneLogin as Idp and I am able to authenticate and after that I am getting error. please find these snaps for reference

now after getting authenticated facing the issue as mentioned above.

Any video reference for workspaces web demo would be of great help. Thanks in Advance