Formatting a file causes error in LSP log panel

[jamesWalker55]

When trying to format a file, nothing happens to the current file. In the LSP log panel, this error appears:

LSP-pylsp: 2022-03-14 20:50:00,152 GMT Standard Time - ERROR - pylsp_jsonrpc.endpoint - Failed to handle request 27
LSP-pylsp: Traceback (most recent call last):
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp_jsonrpc\endpoint.py", line 116, in consume
LSP-pylsp:     self._handle_request(message['id'], message['method'], message.get('params'))
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp_jsonrpc\endpoint.py", line 185, in _handle_request
LSP-pylsp:     handler_result = handler(params)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp_jsonrpc\dispatchers.py", line 25, in handler
LSP-pylsp:     return method(**(params or {}))
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp\python_lsp.py", line 366, in m_text_document__formatting
LSP-pylsp:     return self.format_document(textDocument['uri'])
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp\python_lsp.py", line 281, in format_document
LSP-pylsp:     return self._hook('pylsp_format_document', doc_uri)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp\python_lsp.py", line 156, in _hook
LSP-pylsp:     return hook_handlers(config=self.config, workspace=workspace, document=doc, **kwargs)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_hooks.py", line 265, in __call__
LSP-pylsp:     return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_manager.py", line 80, in _hookexec
LSP-pylsp:     return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_manager.py", line 327, in traced_hookexec
LSP-pylsp:     return outcome.get_result()
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_result.py", line 60, in get_result
LSP-pylsp:     raise ex[1].with_traceback(ex[2])
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_result.py", line 33, in from_call
LSP-pylsp:     result = func()
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_manager.py", line 324, in <lambda>
LSP-pylsp:     lambda: oldcall(hook_name, hook_impls, kwargs, firstresult)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_callers.py", line 60, in _multicall
LSP-pylsp:     return outcome.get_result()
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_result.py", line 60, in get_result
LSP-pylsp:     raise ex[1].with_traceback(ex[2])
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pluggy\_callers.py", line 39, in _multicall
LSP-pylsp:     res = hook_impl.function(*args)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp_black\plugin.py", line 13, in pylsp_format_document
LSP-pylsp:     return format_document(document)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp_black\plugin.py", line 36, in format_document
LSP-pylsp:     config = load_config(document.path)
LSP-pylsp:   File "c:\users\james\appdata\local\sublime text\package storage\lsp-pylsp\lib\site-packages\pylsp_black\plugin.py", line 82, in load_config
LSP-pylsp:     pyproject_filename = root / "pyproject.toml"
LSP-pylsp: TypeError: unsupported operand type(s) for /: 'tuple' and 'str'

In plugin.py line 80, the value of root is (WindowsPath('D:/'), 'file system root'). Looking at Black's documentation, this function is expected to output a tuple - https://black.readthedocs.io/en/stable/contributing/reference/reference_functions.html#black.find_project_root

[rwols]

This seems to be an upstream issue: rupert/pyls-black#40