TypeError: argument of 'NoneType' is not iterable

Hey, first of all - thank you so much for an amazing project. I'm getting an error on NixOS (currently on unstable version, but I've also tried with 25.05). I'm also using Hyprland, version: `Hyprland 0.50.1 built from branch v0.50.1-b at commit 4e242d086e20b32951fdc0ebcbfb4d41b5be8dcc`. `nwg-displays` version is 0.3.25 . The error, is the following: ```python Error loading json: Expecting value: line 1 column 1 (char 0) Traceback (most recent call last): File "/nix/store/jk8cclq15v6p6b5hviwm6gg684jpw1gg-nwg-displays-0.3.25/bin/.nwg-displays-wrapped", line 9, in <module> sys.exit(main()) ~~~~^^ File "/nix/store/jk8cclq15v6p6b5hviwm6gg684jpw1gg-nwg-displays-0.3.25/lib/python3.13/site-packages/nwg_displays/main.py", line 10 79, in main if config_keys_missing(config, config_file): ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^ File "/nix/store/jk8cclq15v6p6b5hviwm6gg684jpw1gg-nwg-displays-0.3.25/lib/python3.13/site-packages/nwg_displays/tools.py", line 2 90, in config_keys_missing if key not in config: ^^^^^^^^^^^^^^^^^ TypeError: argument of type 'NoneType' is not iterable ``` Any help with this would be greatly appreciated!