Free_WAF for Nginx v5.0 on Nginx v1.27 error

Traceback (most recent call last):
File "/www/server/panel/class/panelPlugin.py", line 2256, in a
return public.run_plugin(get.name, get.s, get)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/www/server/panel/class/public/common.py", line 8544, in run_plugin
raise PanelError(res['msg'])
public.exceptions.PanelError: An error occurred while the panel was running: Traceback (most recent call last):
File "/www/server/panel/plugin/free_waf/free_waf_main.py", line 275, in get_config
config = json.loads(public.readFile(self.path + 'config.json'));
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/www/server/panel/pyenv/lib/python3.12/json/init__.py", line 339, in loads
raise TypeError(f'the JSON object must be str, bytes or bytearray, '
TypeError: the JSON object must be str, bytes or bytearray, not bool