3D warehouse does not work

[DaveR]

See:

3D Warehouse in SketchUp 2017

Due to recent changes in the Chromium embedded browser, we are no longer able to support the embedded web dialog in SketchUp 2017 Make and Pro. You can still download from 3D Warehouse using an up-to-date browser like Chrome, Edge, Safari, or Firefox, or by using the Components dialog in SketchUp 2017. Thanks for your understanding.

You should upgrade to SketchUp Pro anyway since it appears you are using it in your busniess. You do some really nice work, by the way.