Unable to export to WebGL with Unity 6

[tarragonfly]

Unity 6 released a while ago and is considered an LTS release by the new Unity release standards but WebGL export is currently non-functional when trying to export Rive getting-started example project from here: https://github.com/rive-app/rive-unity-examples/tree/main/getting-started

Unity: 6000.0.26f1
Rive runtimes: 2.1.0

Building Library\Bee\artifacts\WebGL\build\debug_WebGL_wasm\build.js failed with output:
wasm-ld: error: Library/PackageCache/app.rive.rive-unity/Runtime/Libraries/WebGL/librive_wasm.a(artboard.o): undefined symbol: std::__2::__vector_base_common<true>::__throw_length_error() const
emcc: error: 'C:/GameDev/6000.0.26f1/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/llvm\wasm-ld.exe @C:\Users\gdev\AppData\Local\Temp\emscripten_7f06ey06.rsp.utf-8' failed (returned 1)

UnityEditor.BuildPlayerWindow:BuildPlayerAndRun ()

[damzobridge]

Hmm, it seems like something changed with Emscripten in Unity 6. We're looking into it.