install sdk-fastcomp-tag but not success

command line in window10: emsdk install sdk-fastcomp-tag-1.38.11-64bit

error :

Installing SDK 'sdk-fastcomp-tag-1.38.11-64bit'..
Installing tool 'fastcomp-clang-tag-e1.38.11-64bit'..
The contents of file 'https://github.com/emscripten-core/emscripten-fastcomp/archive/1.38.11.zip' already exist in destination 'F:/MyWorkspace/svn_repo/Unity5_Workspace/emsdk/fastcomp-clang/tag-e1.38.11\src', skipping.
The contents of file 'https://github.com/emscripten-core/emscripten-fastcomp-clang/archive/1.38.11.zip' already exist in destination 'F:/MyWorkspace/svn_repo/Unity5_Workspace/emsdk/fastcomp-clang/tag-e1.38.11\src\tools/clang', skipping.
Running CMake: ['cmake', '-G', 'Visual Studio 16', '-DCMAKE_BUILD_TYPE=Release', '-DPYTHON_EXECUTABLE=F:\\MyWorkspace\\svn_repo\\Unity5_Workspace\\emsdk\\python\\3.9.2-1_64bit\\python.exe', '-DCMAKE_OSX_DEPLOYMENT_TARGET=10.11', '-A', 'x64', '-DLLVM_TARGETS_TO_BUILD=X86;JSBackend', '-DLLVM_INCLUDE_EXAMPLES=OFF', '-DCLANG_INCLUDE_EXAMPLES=OFF', '-DLLVM_INCLUDE_TESTS=OFF', '-DCLANG_INCLUDE_TESTS=OFF', '-DLLVM_ENABLE_ASSERTIONS=OFF', 'F:/MyWorkspace/svn_repo/Unity5_Workspace/emsdk/fastcomp-clang/tag-e1.38.11\\src']
CMake Deprecation Warning at CMakeLists.txt:14 (cmake_policy):
The OLD behavior for policy CMP0051 will be removed from a future version
of CMake.

The cmake-policies(7) manual explains that the OLD behaviors of all
policies are deprecated and that a policy should be set to OLD only under
specific short-term circumstances. Projects should be ported to the NEW
behavior and not rely on setting a policy to OLD.

CMake Warning at CMakeLists.txt:39 (message):
Visual Studio generators use the x86 host compiler by default, even for
64-bit targets. This can result in linker instability and out of memory
errors. To use the 64-bit host compiler, pass -Thost=x64 on the CMake
command line.

-- Could NOT find Backtrace (missing: Backtrace_LIBRARY Backtrace_INCLUDE_DIR)
-- Native target architecture is X86
-- Threads enabled.
-- Doxygen disabled.
-- Go bindings disabled.
-- Could NOT find OCaml (missing: OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH)
-- OCaml bindings disabled.
-- Could NOT find Python module pygments
-- Could NOT find Python module pygments.lexers.c_cpp
-- Could NOT find Python module yaml
-- LLVM host triple: x86_64-pc-win32
-- LLVM default target triple: x86_64-pc-win32
-- Using Debug VC++ CRT: MDd
-- Using Release VC++ CRT: MD
-- Using MinSizeRel VC++ CRT: MD
-- Using RelWithDebInfo VC++ CRT: MD
-- Using Release VC++ CRT: MD
-- Constructing LLVMBuild project information
-- LLVMHello ignored -- Loadable modules not supported on this platform.
-- Targeting X86
-- Targeting JSBackend
-- Clang version: 6.0.1
-- SampleAnalyzerPlugin ignored -- Loadable modules not supported on this platform.
-- PrintFunctionNames ignored -- Loadable modules not supported on this platform.
-- AnnotateFunctions ignored -- Loadable modules not supported on this platform.
-- BugpointPasses ignored -- Loadable modules not supported on this platform.
-- Configuring done
-- Generating done
-- Build files have been written to: F:/MyWorkspace/svn_repo/Unity5_Workspace/emsdk/fastcomp-clang/tag-e1.38.11/build_tag-e1.38.11_vs2019_64
Performing a parallel build with 3 cores.
Traceback (most recent call last):
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 3262, in
sys.exit(main(sys.argv[1:]))
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 3244, in main
tool.install()
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 1970, in install
return self.install_sdk()
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 1985, in install_sdk
installed |= tool.install()
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 1972, in install
return self.install_tool()
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 2020, in install_tool
success = build_fastcomp(self)
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 1197, in build_fastcomp
success = make_build(build_root, build_type, 'x64' if tool.bitness == 64 else 'Win32')
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 1016, in make_build
generator_to_use = get_generator_for_sln_file(os.path.join(build_root, solution_name))
File "F:\MyWorkspace\svn_repo\Unity5_Workspace\emsdk\emsdk.py", line 969, in get_generator_for_sln_file
contents = open(sln_file, 'r').read()
UnicodeDecodeError: 'gbk' codec can't decode byte 0xbf in position 2: illegal multibyte sequence