Error when server: ModuleNotFoundError: No module named 'livereload'
log
```
$ mkdocs serve
INFO - Building documentation...
Traceback (most recent call last):
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "C:\Users\\AppData\Local\Programs\Python\Python39\Scripts\mkdocs.exe\__main__.py", line 7, in
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1137, in __call__
return self.main(*args, **kwargs)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1062, in main
rv = self.invoke(ctx)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1668, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 1404, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\click\core.py", line 763, in invoke
return __callback(*args, **kwargs)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\__main__.py", line 173, in serve_command
serve.serve(dev_addr=dev_addr, livereload=livereload, **kwargs)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\commands\serve.py", line 54, in serve
config = builder()
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\commands\serve.py", line 35, in builder
config = load_config(
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\config\base.py", line 224, in load_config
errors, warnings = cfg.validate()
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\config\base.py", line 108, in validate
run_failed, run_warnings = self._validate()
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\config\base.py", line 63, in _validate
self[key] = config_option.validate(value)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\config\config_options.py", line 130, in validate
return self.run_validation(value)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\config\config_options.py", line 636, in run_validation
plgins[item] = self.load_plugin(item, cfg)
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs\config\config_options.py", line 649, in load_plugin
Plugin = self.installed_plugins[name].load()
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\importlib_metadata\__init__.py", line 194, in load
module = import_module(match.group('module'))
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1030, in _gcd_import
File "", line 1007, in _find_and_load
File "", line 986, in _find_and_load_unlocked
File "", line 680, in _load_unlocked
File "", line 850, in exec_module
File "", line 228, in _call_with_frames_removed
File "C:\Users\\AppData\Local\Programs\Python\Python39\lib\site-packages\mkdocs_extra_sass_plugin\plugin.py", line 10, in
from livereload import Server
ModuleNotFoundError: No module named 'livereload'
```
Error when server:
ModuleNotFoundError: No module named 'livereload'
log
``` $ mkdocs serve INFO - Building documentation... Traceback (most recent call last): File "C:\Users\