HTML5 build fails with RiveSceneBuilder.getSrcBuilder error — Defold 1.14.0 / Rive 13.2.2

Bugs
1

My project fails to bundle for HTML5 when compiling a .rivescene file.

Versions

  • Defold: 1.14.0 stable
  • Editor and engine SHA1: d295ed4edff2e49072719835713e625f409849f1
  • Rive extension: 13.2.2
  • OS: Windows
  • Target: HTML5

Dependency

https://github.com/defold/extension-rive/archive/refs/tags/13.2.2.zip
https://github.com/widgrensit/asobi-defold/archive/main.zip
https://github.com/defold/extension-websocket/archive/refs/tags/4.1.1.zip

Error

/main/Main board.rivescene
'com.google.protobuf.GeneratedMessageV3$Builder com.dynamo.bob.pipeline.RiveSceneBuilder.getSrcBuilder(com.dynamo.bob.fs.IResource)'

Build log:

2026-10-25 00:04:54 SEVERE Task 'RiveScene' ([main/Main board.rivescene, build/default_html5/assets/rive export/grid_hackers_ic.rivc, build/default_html5/defold-rive/assets/empty.a.texturesetc, build/default_html5/defold-rive/assets/empty.texturec]) failed

Steps taken

  1. Fetched libraries again.
  2. Restarted Defold.
  3. Rebuilt the project.
  4. Renamed .internal and build so Defold could recreate them, fetched libraries again, and retried the HTML5 bundle.

The same error persists.

Expected behaviour

The Rive scene compiles successfully and the HTML5 bundle is created.