He navigated to the and checked the Ruby Console panel inside the software (accessed via Window > Ruby Console ). There, in red text, was the culprit.

Some users report that the automatic installation via Extension Warehouse returns a 404. Install manually:

Contact MindSight support. They respond within 24 hours. Provide your SketchUp.log file (found in the same AppData folder).

Profile Builder 4 is a major update to the popular SketchUp extension, offering nearly 60 new features and improvements for modeling real building materials parametrically. It is fully compatible with SketchUp versions , as well as newer versions like 2025 and 2026. Key Features in Version 4