Profile Builder sometimes initializes a tiny local web server on your machine to pass data between SketchUp and the extension window. Portable sandboxing often blocks these internal communication ports.
Profile Builder 4 is a premier extension for SketchUp, widely used by architects and 3D modelers to extrude intelligent profiles and assemblies. However, users running versions (from 2021 up to 2024) frequently encounter a frustrating "404 Not Found" error within the extension's user interface .
Released in early 2024, version 4 introduced nearly 60 improvements: Profile Builder for SketchUp profile builder 404 for sketchup 20212024 portable
Open Windows Run ( Win + R ), type %appdata% , and press Enter.
: Profile Builder uses an internal localized web server to render its user interface. When SketchUp is run portably, the HTML/JS frontend cannot resolve the relative paths to the Ruby backend, returning a blank window or a explicit 404 Not Found error. Profile Builder sometimes initializes a tiny local web
Portable applications run in a virtualized sandbox. If the extension tries to read registry keys or license data outside that sandbox, the connection breaks. Step-by-Step Solutions to Fix Profile Builder 404
Right-click your portable SketchUp launcher and choose Run as Administrator to grant the application permission to bind local web ports. However, users running versions (from 2021 up to
Open your portable SketchUp directory (on your flash drive or external folder). Look for a folder named Data , Sandbox , App , or UserProfile .
Move the DM_ProfileBuilder3 or DM_ProfileBuilder4 folder along with its corresponding .rb file into this newly created folder.