I'm trying to expose a lightning component with lightning out in a Heroku app. In localhost, I can able to view a lightning component developed in salesforce with lightning out.
But when I try to deploy this app into a Heroku platform this is not working.
It is throwing an error as
No 'Access-Control-Allow-Origin' header is present on the requested resource. in the brwoser console
I have whitelisted the localhost and the heroku domain in the CORS and in the CSP Trusted sites.
What should I be missing?