Why am I getting different responses for the same query?

Question

API

So, I send a GET request to Postman - " https://pool.apk.aptoide.com/randomy/ozgurcrs-dgs-... "
which returns me 200 OK
Then, I copy the code that Postman generated for me and I add it to my application (just create-react-app with a button that sends a request on click):

var requestOptions = {
  method: 'GET',
  redirect: 'follow'
};

fetch("https://pool.apk.aptoide.com/randomy/ozgurcrs-dgs-1-42117761-5ee6c3cdf6f9d6cf95ba7e5a2ebed6b3.apk", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

And when I send this request through my application, I get this error in Firefox:

error TypeError: NetworkError when attempting to fetch resource.

Or two of these in Chrome:

Access to fetch at ' https://pool.apk.aptoide.com/randomy/ozgurcrs-dgs-... ' from origin ' localhost:3000 ' has been blocked by CORS policy: No 'Access-Control-Allow-Origin ' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
App.js:15 GET https://pool.apk.aptoide.com/randomy/ozgurcrs-dgs-... net::ERR_FAILED 200
clickHandler @ App.js:15
callCallback @ react-dom.development.js:4157
invokeGuardedCallbackDev @ react-dom.development.js:4206
invokeGuardedCallback @ react-dom.development.js:4270
invokeGuardedCallbackAndCatchFirstError @ react-dom.development.js:
executeDispatch @ react-dom.development.js:9011
processDispatchQueueItemsInOrder @ react-dom.development.js:9043
processDispatchQueue @ react-dom.development.js:9056
dispatchEventsForPlugins @ react-dom.development.js:9067
(anonymous) @ react- dom.development.js:9258
batchedUpdates$1 @ react-dom.development.js:25979
batchedUpdates @ react-dom.development.js:3984
dispatchEventForPluginEventSystem @ react-dom.development.js:9257
dispatchEvent @ react-dom.development.js :6435
dispatchDiscreteEvent @ react-dom.development.js:6410
App.js:15 error TypeError: Failed to fetch
at clickHandler (App.js:15:1)
at HTMLUnknownElement.callCallback (react-dom.development.js:4157: one)
at Object.invokeGuardedCallbackDev (react-dom.development.js:4206:1)
at invokeGuardedCallback (react-dom.development.js:4270:1)
at invokeGuardedCallbackAndCatchFirstError (react-dom.development.js:4284:1)
at executeDispatch( react-dom.development.js:9011:1)
at processDispatchQueueItemsInOrder (react-dom.development.js:9043:1)
at processDispatchQueue (react-dom.development.js:9056:1)
at dispatchEventsForPlugins (react-dom.development .js:9067:1)
at react-dom.development.js:9258:1

Why is this happening? CORS can be required when the application is running on localhost?
ws75.aptoide.com/api/7/apps/search?info=1 there is no useful information in the API documentation

Answer 1

CORS can be required when the application is running on localhost?

Yes they can. CORS is handled by the browser.