Installation Error:Tribon conflicted with Python3.8?

[sam2016]

Thanks your kindly explanation. I tried to reinstall the python3.8 to "D:", only "py -3.8 -V" can be working.
"py -3.8 -m pip -V" and "py -3.8 -m idlelib" also errors.

D:\Program Files\Python\Python38>py -V
Python 3.8.0

D:\Program Files\Python\Python38>py -3.8 -m pip -V
Python path configuration:
  PYTHONHOME = (not set)
  PYTHONPATH = 'C:\Tribon\M3\Vitesse;C:\Tribon\M3\Vitesse\Basic_Design;C:\Tribon\M3\Vitesse\Lib;C:\Tribon\M3\Vitesse\Projects;C:\Tribon\M3\bin\python;'
  program name = 'D:\Program Files\Python\Python38\python.exe'
  isolated = 0
  environment = 1
  user site = 1
  import site = 1
  sys._base_executable = 'D:\\Program Files\\Python\\Python38\\python.exe'
  sys.base_prefix = 'D:\\Program Files\\Python\\Python38'
  sys.base_exec_prefix = 'D:\\Program Files\\Python\\Python38'
  sys.executable = 'D:\\Program Files\\Python\\Python38\\python.exe'
  sys.prefix = 'D:\\Program Files\\Python\\Python38'
  sys.exec_prefix = 'D:\\Program Files\\Python\\Python38'
  sys.path = [
    'C:\\Tribon\\M3\\Vitesse',
    'C:\\Tribon\\M3\\Vitesse\\Basic_Design',
    'C:\\Tribon\\M3\\Vitesse\\Lib',
    'C:\\Tribon\\M3\\Vitesse\\Projects',
    'C:\\Tribon\\M3\\bin\\python',
    '',
    'D:\\Program Files\\Python\\Python38\\python38.zip',
    'D:\\Program Files\\Python\\Python38\\DLLs',
    'D:\\Program Files\\Python\\Python38\\lib',
    'D:\\Program Files\\Python\\Python38',
  ]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
  File "C:\Tribon\M3\bin\python\encodings\__init__.py", line 109
    raise CodecRegistryError,\
                            ^
SyntaxError: invalid syntax

Current thread 0x00001564 (most recent call first):
<no Python frame>

D:\Program Files\Python\Python38>