Question how to solve？ error: undefined symbol: sendfile (referenced by top-level compiled C/C++ code)

Unity 2021.3.11f1c2， mac m1

Building Library/Bee/artifacts/WebGL/build/debug_WebGL_wasm/build.js failed with output:
error: undefined symbol: _ZN14RefcountedData7ReleaseEv (referenced by top-level compiled C/C++ code)
warning: Link with `-s LLD_REPORT_UNDEFINED` to get more information on undefined symbols
warning: To disable errors for undefined symbols use `-s ERROR_ON_UNDEFINED_SYMBOLS=0`
warning: __ZN14RefcountedData7ReleaseEv may need to be added to EXPORTED_FUNCTIONS if it arrives from a system library
error: undefined symbol: sendfile (referenced by top-level compiled C/C++ code)
warning: _sendfile may need to be added to EXPORTED_FUNCTIONS if it arrives from a system library
Error: Aborting compilation due to previous errors
emcc2: error: '/Applications/Unity/Hub/Editor/2021.3.11f1c2/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/node/node /Applications/Unity/Hub/Editor/2021.3.11f1c2/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emscripten/src/compiler.js /var/folders/lj/1b_yv7ss7db44gwq37h0px5h0000gn/T/tmpu085u7d0.txt' failed (1)
UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)


others：

 

Is this with an empty project or one that used to build but stopped creating builds just now? In the latter case, check what you changed since the last working build.

It may also help to test building with a newer Unity version (keep a backup of the project).

 

test also deleting library folder,
if you added some plugin recently that might cause it also.

and can test if building webgl 1.0 vs webgl 2.0 works.

i had same error caused by one asset store plugin, which the developer had then upgraded to work with webgl 2.
https://forum.unity.com/threads/lib...ying-to-build-for-webgl.1220706/#post-8166515

 

i got the same issue....don't know why...

 

Have you finally solved this problem