Ionic + Angular - How to avoid the “404 Not Found (from cache)” after POST request?

Question

this question is partly pointing to my previous question : Ionic + Angular POST request return state 404

But i wasn\'t able to find working solution.

Problem i

Answer 1

After many hours, I found one solution that worked: run cordova plugin add cordova-plugin-whitelist

In my case, I had already configured config.xml and index.html on origin, as mentioned here and elsewhere.