Hello billias86,
Our plugin provides exact error messages like that one which points our users to the root of the issue. In order to plugin work, it requires read/write permission for the wp-content/custom_codes folder. I believe you can simply arrange that by following this articles:
https://v2cloud.com/tutorials/how-to-change-folder-permissions-on-windows-2016
Looks like your website/server has a general permission issue. Custom Codes are not conflicting any other theme builder or WordPress functions such as Customizer.
Please kindly take a look to the permission issues. Then, if the issue still persists, let us know by sending an email to [email protected].
Best,
Atakan