Problems accessing 3D Warehouse via Sketchup 2017

I have been trying to upload models from Sketchup 2017 over the last few months but it appears that the access to 3D Warehouse from Sketchup doesn’t appear to work? I’m not able to access my public content and can only access any of the features if I log in via a web browser. Has something changed in the features available to 2017 users?

Yes it is changed. The 3D Warehouse will not work inside SU2017. It doesn’t support 2018 and earlier. You can access it via web browser as you discovered.