@Brendan I've been banging my head against this all day and tried everything I can think of three or four different times.
I'm using the Facepunch.Steamworks package
The steam ticket I use looks a lot like
1400000068025413d84a93fb8d93d700010010015b2d3a5c1800000001000000020000004e8569822200a8c091d73a0003000000b200000032000000040000008d93d70001001001e00100004e8569822200a8c000000000db83375c5b33535c010000000000000000000c1d790a526c01118850b64433f155d78200f7f21e379391369e050ee0952505099dc4988b1e26e6666fff9e1f9d5ae2767173bde60b1bbff233798a020b9bac364b2c41a092f692b00f761b592cc8a684bb622e221e06ea58dc4808724ea63a021a0ad721c56d5790ca1a79293ccc8239fc8a5ebb567b2cc7f83ed01baa93d9
and the TitleID is B89D
I have added you to the app in steam (hopefully) but it does ask several 'required' questions like steam account name so I'm not sure if it worked. Steam App ID is 1011510.
Is there a way to see more detail about errors somewhere in the playfab site (to be able to verify the right app id is being used). This is a newly setup app id and has not been through review yet, is it possible everything is setup correctly and the game just hasn't been approved yet so the web API calls do not work? I've checked every thread I could find related to this and tried everything in them but the only progress I made is occasionally I managed to stop the basic steam initialization from working. Thanks in advance.