Unity WebGL build failed, seems something wrong with il2cpp - unity-webgl

Question

It runs good at a windows platform. But when I switch platform to webgl and build it, there is an error as following. As a beginner of Unity, it hard for me to figure out what happened, so I try to search for some answers. But there seems few similar questions.
Building Library\Bee\artifacts\WebGL\il2cpp\master_WebGL_wasm\9tk2_eric0.lump.o failed with output:
In file included from Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/ipux_Generic0.lump.cpp:3:
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:94:36: error: 'SetWaitObject' is a private member of 'il2cpp::os::ThreadImpl'
currentThread->SetWaitObject(this);
^
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Posix\ThreadImpl.h:105:14: note: declared private here
void SetWaitObject(posix::PosixWaitObject* waitObject);
^
In file included from Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/ipux_Generic0.lump.cpp:3:
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:94:50: error: cannot initialize a parameter of type 'posix::PosixWaitObject *' with an rvalue of type 'il2cpp::os::WaitObject *'
currentThread->SetWaitObject(this);
^~~~
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Posix\ThreadImpl.h:105:52: note: passing argument to parameter 'waitObject' here
void SetWaitObject(posix::PosixWaitObject* waitObject);
^
In file included from Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/ipux_Generic0.lump.cpp:3:
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:148:36: error: 'SetWaitObject' is a private member of 'il2cpp::os::ThreadImpl'
currentThread->SetWaitObject(NULL);
^
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Posix\ThreadImpl.h:105:14: note: declared private here
void SetWaitObject(posix::PosixWaitObject* waitObject);
^
In file included from Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/ipux_Generic0.lump.cpp:3:
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:161:36: error: 'SetWaitObject' is a private member of 'il2cpp::os::ThreadImpl'
currentThread->SetWaitObject(NULL);
^
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Posix\ThreadImpl.h:105:14: note: declared private here
void SetWaitObject(posix::PosixWaitObject* waitObject);
^
In file included from Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/ipux_Generic0.lump.cpp:3:
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:227:17: error: no member named 'AcquireSemaphore' in 'il2cpp::os::ThreadImpl'
thread->AcquireSemaphore();
~~~~~~ ^
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:238:28: error: no member named 'TryTimedAcquireSemaphore' in 'il2cpp::os::ThreadImpl'
bool ret = thread->TryTimedAcquireSemaphore(timeout);
~~~~~~ ^
D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\il2cpp\libil2cpp\os\Generic\WaitObject.cpp:264:33: error: no member named 'ReleaseSemaphore' in 'il2cpp::os::ThreadImpl'
object->thread->ReleaseSemaphore();
~~~~~~~~~~~~~~ ^
7 errors generated.
emcc2: error: 'D:/1installfiles/unity/Editor/2021.3.12f1c1/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/llvm\clang++.exe -target wasm32-unknown-emscripten -DEMSCRIPTEN -fno-inline-functions -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -D__EMSCRIPTEN_major__=2 -D__EMSCRIPTEN_minor__=0 -D__EMSCRIPTEN_tiny__=19 -D_LIBCPP_ABI_VERSION=2 -Dunix -D__unix -D__unix__ -Werror=implicit-function-declaration -Xclang -iwithsysroot/include/SDL --sysroot=D:\1installfiles\unity\Editor\2021.3.12f1c1\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emscripten\cache\sysroot -Xclang -iwithsysroot/include\compat -D__webgl__ -Wno-c++11-extensions -Wno-nonportable-include-path -ffunction-sections -fno-unwind-tables -fomit-frame-pointer -fno-threadsafe-statics -std=c++11 -Wno-#warnings -Wswitch -Wno-trigraphs -Wno-tautological-compare -Wno-invalid-offsetof -Wno-implicitly-unsigned-literal -Wno-integer-overflow -Wno-shift-negative-value -Wno-unknown-attributes -Wno-implicit-function-declaration -Wno-null-conversion -Wno-missing-declarations -Wno-unused-value -Wno-pragma-once-outside-header -fvisibility=hidden -fexceptions -fno-rtti -fno-strict-overflow -ffunction-sections -fdata-sections -fmessage-length=0 -pipe -DBASELIB_INLINE_NAMESPACE=il2cpp_baselib -DIL2CPP_MONO_DEBUGGER_DISABLED -DRUNTIME_IL2CPP -DGC_NOT_DLL -DIL2CPP_DEFAULT_DATA_DIR_PATH=Data -DNDEBUG -I. -ID:/1installfiles/unity/Editor/2021.3.12f1c1/Editor/Data/il2cpp/libil2cpp/pch -ID:/1installfiles/unity/Editor/2021.3.12f1c1/Editor/Data/il2cpp/libil2cpp -ID:/1installfiles/unity/Editor/2021.3.12f1c1/Editor/Data/il2cpp/external/baselib/Include -ID:/1installfiles/unity/Editor/2021.3.12f1c1/Editor/Data/il2cpp/external/baselib/Platforms/WebGL/Include -ID:/1installfiles/unity/Editor/2021.3.12f1c1/Editor/Data/il2cpp/external/bdwgc/include -Oz -fcolor-diagnostics -fdiagnostics-absolute-paths -UGC_THREADS -UUSE_MMAP -UUSE_MUNMAP -c -xc++ Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/ipux_Generic0.lump.cpp -o Library/Bee/artifacts/WebGL/il2cpp/master_WebGL_wasm/9tk2_eric0.lump.o' failed (1)
I tried to change settings in player settings\seeting for webgl. But it didn't work.