I recently integrated an external API into a side project, but I kept hitting a CORS error. The app wouldn’t fetch data, and the console was filled with red warnings. I tried adjusting the fetch headers, but nothing worked.

After some research, I realized the issue was on the server side—my API didn’t have the right CORS configuration. I contacted the API provider and learned to use a proxy server as a workaround. It was a tough lesson in backend dependencies!

Next time, I’ll test APIs more thoroughly before integrating them.