I’m in SketchUp Pro 2018 and trying to open 3D Warehouse and getting the above error message. This is the first time I’ve see this. Normally I have no trouble getting into 3D Warehouse. Has SketchUp dropped support on SketchUp 2018 Pro as it relates to using 3D Warehouse? I checked my internet connection and I have a connection as I can get to this forum.
I did see this for the first time recently. We’re investigating related things, hopefully something obvious will show up as the cause.
In the meantime, for me I could connect to Extension Warehouse, and after that 3D Warehouse was ok.