Windows toolchain out of date or doesn't exist, updating (Pro) error on e sync

________ running 'python3 src/build/landmines.py' in 'C:\Users\c\Desktop\r\electron'
________ running 'python3 src/third_party/depot_tools/update_depot_tools_toggle.py --disable' in 'C:\Users\c\Desktop\r\electron'
________ running 'python3 src/tools/remove_stale_pyc_files.py src/android_webview/tools src/build/android src/gpu/gles2_conform_support src/infra src/ppapi src/printing src/third_party/blink/renderer/build/scripts src/third_party/blink/tools src/third_party/catapult src/tools' in 'C:\Users\c\Desktop\r\electron'
________ running 'python3 src/build/vs_toolchain.py update --force' in 'C:\Users\c\Desktop\r\electron'
Windows toolchain out of date or doesn't exist, updating (Pro)...
  current_hashes:
  desired_hash: e146e01913
Traceback (most recent call last):
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 608, in <module>
    sys.exit(main())
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 547, in main
    DoTreeMirror(toolchain_target_dir, args.desired_hash)
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 363, in DoTreeMirror
    temp_dir, local_zip = DownloadUsingHttp(tree_sha1 + '.zip')
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 313, in DownloadUsingHttp
    import urlparse
ModuleNotFoundError: No module named 'urlparse'
Traceback (most recent call last):
  File "src/build/vs_toolchain.py", line 573, in <module>
    sys.exit(main())
  File "src/build/vs_toolchain.py", line 569, in main
    return commands[sys.argv[1]](*sys.argv[2:])
  File "src/build/vs_toolchain.py", line 517, in Update
    subprocess.check_call(get_toolchain_args)
  File "C:\Users\c\.electron_build_tools\third_party\depot_tools\bootstrap-2@3_8_10_chromium_19_bin\python3\bin\lib\subprocess.py", line 364, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['C:\\Users\\c\\.electron_build_tools\\third_party\\depot_tools\\bootstrap-2@3_8_10_chromium_19_bin\\python3\\bin\\python3.exe', 'C:\\Users\\c\\Desktop\\r\\electron\\src\\third_party\\depot_tools\\win_toolchain\\get_toolchain_if_necessary.py', '--output-json', 'C:\\Users\\c\\Desktop\\r\\electron\\src\\build\\win_toolchain.json', 'e146e01913', '--force']' returned non-zero exit status 1.
Error: Command 'python3 src/build/vs_toolchain.py update --force' returned non-zero exit status 1 in C:\Users\c\Desktop\r\electron
Windows toolchain out of date or doesn't exist, updating (Pro)...
  current_hashes:
  desired_hash: e146e01913
Traceback (most recent call last):
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 608, in <module>
    sys.exit(main())
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 547, in main
    DoTreeMirror(toolchain_target_dir, args.desired_hash)
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 363, in DoTreeMirror
    temp_dir, local_zip = DownloadUsingHttp(tree_sha1 + '.zip')
  File "C:\Users\c\Desktop\r\electron\src\third_party\depot_tools\win_toolchain\get_toolchain_if_necessary.py", line 313, in DownloadUsingHttp
    import urlparse
ModuleNotFoundError: No module named 'urlparse'
Traceback (most recent call last):
  File "src/build/vs_toolchain.py", line 573, in <module>
    sys.exit(main())
  File "src/build/vs_toolchain.py", line 569, in main
    return commands[sys.argv[1]](*sys.argv[2:])
  File "src/build/vs_toolchain.py", line 517, in Update
    subprocess.check_call(get_toolchain_args)
  File "C:\Users\c\.electron_build_tools\third_party\depot_tools\bootstrap-2@3_8_10_chromium_19_bin\python3\bin\lib\subprocess.py", line 364, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['C:\\Users\\c\\.electron_build_tools\\third_party\\depot_tools\\bootstrap-2@3_8_10_chromium_19_bin\\python3\\bin\\python3.exe', 'C:\\Users\\c\\Desktop\\r\\electron\\src\\third_party\\depot_tools\\win_toolchain\\get_toolchain_if_necessary.py', '--output-json', 'C:\\Users\\c\\Desktop\\r\\electron\\src\\build\\win_toolchain.json', 'e146e01913', '--force']' returned non-zero exit status 1.

ERROR Error: Command failed: python C:\Users\c\.electron_build_tools\third_party\depot_tools\gclient.py sync --with_branch_heads --with_tags -vv
    at checkExecSyncError (child_process.js:643:11)
    at Object.execFileSync (child_process.js:661:15)
    at Object.depotExecFileSync [as execFileSync] (C:\Users\c\.electron_build_tools\src\utils\depot-tools.js:118:16)
    at runGClientSync (C:\Users\c\.electron_build_tools\src\e-sync.js:54:9)
    at Object.<anonymous> (C:\Users\c\.electron_build_tools\src\e-sync.js:76:3)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12)

Hi, I am getting the above error when running e sync.

Anyone facing the same issue or can suggest a solution?

I am sure I have all the prerequisites installed. I tried a fresh installation following all the instructions from scratch on two different machines already.

[ChrisPei]

I found the solution.

If you have already created the Visual Studio build environment manually Building Chromium for Windows

Next you can try this:

Check out your evn file at %USERPROFILE%\.electron_build_tools\configs\evm.xxxx.json

...
  "env": {
    "CHROMIUM_BUILDTOOLS_PATH": ".......",
    "GIT_CACHE_PATH": ".........",
    "DEPOT_TOOLS_WIN_TOOLCHAIN": 0 # <--  + Add this line!!!
  }
...

[jkleinsc]

Build tools should now pull in the right toolchain. Please run e check-for-updates to get the latest build tools