If you have an earlier version of SketchUp and use Google ID to sign in, you can create a Trimble ID to continue signing in to older builds.
To create a Trimble ID, please visit our article detailing the process.
Sign in to 3D Warehouse, Add Location, and Extension Warehouse
As part of the new sign-in workflows, users will now need to sign in to see the 3D Warehouse or Extension Warehouse. This will only affect Classic License users since subscribers must already be signed in. If you are a Classic License user, you will see the below notification if you try to use 3D Warehouse or Extension Warehouse when not signed in: