I am working on a macro using custom UI which requires the use of an iframe, but when I attempt to render it with a src which is listed in the manifest file under external frames, I get the following error 'Refused to frame '...' because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'self'". Has anyone encountered this issue before, if so is there a solution here? I might have missed something quite obvious any feedback would be much appreciated!
manifest.yml + App.js files below