TypeError when formatting with Black 22.1

[wlcx]

When attempting to format, I get an error. The backtrace from lsp.log is below:

Failed to handle request 2
Traceback (most recent call last):
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp_jsonrpc/endpoint.py\", line 116, in consume
    self._handle_request(message['id'], message['method'], message.get('params'))
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp_jsonrpc/endpoint.py\", line 185, in _handle_request
    handler_result = handler(params)
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp_jsonrpc/dispatchers.py\", line 25, in handler
    return method(**(params or {}))
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp/python_lsp.py\", line 366, in m_text_document__formatting
    return self.format_document(textDocument['uri'])
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp/python_lsp.py\", line 281, in format_document
    return self._hook('pylsp_format_document', doc_uri)
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp/python_lsp.py\", line 156, in _hook
    return hook_handlers(config=self.config, workspace=workspace, document=doc, **kwargs)
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_hooks.py\", line 265, in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_manager.py\", line 80, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_manager.py\", line 327, in traced_hookexec
    return outcome.get_result()
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_result.py\", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_result.py\", line 33, in from_call
    result = func()
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_manager.py\", line 324, in <lambda>
    lambda: oldcall(hook_name, hook_impls, kwargs, firstresult)
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_callers.py\", line 60, in _multicall
    return outcome.get_result()
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_result.py\", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
  File \"<snip>/.venv/lib/python3.9/site-packages/pluggy/_callers.py\", line 39, in _multicall
    res = hook_impl.function(*args)
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp_black/plugin.py\", line 13, in pylsp_format_document
    return format_document(document)
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp_black/plugin.py\", line 36, in format_document
    config = load_config(document.path)
  File \"<snip>/.venv/lib/python3.9/site-packages/pylsp_black/plugin.py\", line 82, in load_config
    pyproject_filename = root / \"pyproject.toml\"
TypeError: unsupported operand type(s) for /: 'tuple' and 'str'
"

Looks like the latest version of black, 22.1.0, changed the signature for find_project_root, now returning a tuple.