Expo client run in phone communication with local backend - spring-boot

Question

I'm trying out the communication between my backend / frontend. The application is developed in react native and my backend is based on spring boot. When I run my application in my phone through the Expo Go app I can't send http requests to my backend (it works with postman at: localhost:8080/user).
When I try to do the same requests in my application I have defined the following function:
export function signup(signupRequest) {
return fetch({
url: "192.168.10.152:8080" + "/user",
method: "POST",
body: JSON.stringify(signupRequest)
});
}
And then I get the following error:
[Unhandled promise rejection: TypeError: Network request failed]
at node_modules/whatwg-fetch/dist/fetch.umd.js:535:17 in setTimeout$argument_0
If it helps I run my backend on ubuntu 20.04 and I got my local ip with the command
ip a
Update, I have no updated my application.properties in my spring-boot project like this:
server.address=192.168.10.152
server.port=8080
I still get the same error when I try to make a post-request from my react native application however.

Answer 1

I tried to push my backend to the domain with https protocol and everything was ok. There's an application, ngrok that allows you to send requests to a server but using other link with https protocol.
For example, if you have your backend server on localhost:5000, then you need to open ngrok command line and integrate your server with ngrok http 5000 command. As the result you'll get a link that will look like this:
https://f971-31-128-76-233.eu.ngrok.io