Trimble (the makers of SketchUp) officially stopped supporting the 2014 version years ago. This means: No Extension Warehouse: Most modern plugins won't work. No 3D Warehouse: You cannot download models directly into the software. Compatibility Issues:
However, navigating the licensing landscape for a software version this old requires a bit of "tech archaeology." Here is everything you need to know about licensing, activating, and alternatives for this classic version. Understanding SketchUp 2014 Licensing
While the 2014 version is no longer sold, users have legitimate paths forward:
The Risks of Using SketchUp Pro 2014 Crack Keygens and Serials