'React Native exported application not communicating with the server

I created an application that communicates with my created fast-api backend. While I developped the application it was working fine, but after when everything was done, I exported the application.

After this I installed this application on multiple device, but after starting the application I can't login through the login panel. Or I cant even register. Its like there is no connection between the apk and the server.

I looked for some questions but I didn't see something similar. Thank you for your answers :)



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