MES Customization Validation for Error - Help Needed

We have a customization on our MES screen that allows the user to pull up a baq report. This customization had an error that it was not valid for but that has since been fixed. The issue now is that when I go into Config Editor to put in the MESCustomMenuId I get the following error:


Has anyone else run into this issue before?

seems like your config file is corrupted somehow you can just modify the config by hand

Just tried opening the config in notepad++ and it shows nulls everywhere. Is there another way to modify it?