Third-party API blocked by CORS policy

We are working on integration of zoom app using the sample app provided in forum (zoomapps-advancedsample-react)
However, as we try to make a external API call from the app, we are getting this error -

“Access to XMLHttpRequest at ‘https://api.publicapis.org/entries’ from origin ‘3d85-2402-3a80-18c2-a92e-cddd-e545-f1f4-b7da.in.ngrok.io’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.”

Can you please help us to find the root cause here

We find a solution
we add a base URL in to App’s Allow List Domains now its working