Connection problem when trying to run an empty React native app on my Android cellphone

I have a problem that has been driving me crazy for two days now. I have created a new empty React Native app following the instructions of the official page. The problem is that I can´t make it work on my cellphone. I´m getting this when I try to run it:

PS C:AMyApp> npm run android

> [email protected] android
> react-native run-android

info JS server already running.

info 💡 Tip: Make sure that you have set up your development environment correctly, by running react-native doctor. To read more about doctor command visit: https://github.com/react-native-community/cli/blob/main/packages/cli-doctor/README.md#doctor 

Exception in thread "main" java.net.ConnectException: Connection refused: connect
        at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
        at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107)
        at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
        at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
        at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
        at java.base/java.net.Socket.connect(Socket.java:609)
        at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:509)
        at java.base/sun.net.www.http.HttpClient$1.run(HttpClient.java:561)
        at java.base/sun.net.www.http.HttpClient$1.run(HttpClient.java:559)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.base/sun.net.www.http.HttpClient.privilegedOpenServer(HttpClient.java:558)
        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:599)
        at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
        at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:373)
        at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:216)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1208)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
        at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:193)       
        at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1592)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1520)
        at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:250)
        at org.gradle.wrapper.Download.downloadInternal(Download.java:109)
        at org.gradle.wrapper.Download.download(Download.java:89)
        at org.gradle.wrapper.Install$1.call(Install.java:83)
        at org.gradle.wrapper.Install$1.call(Install.java:63)
        at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:69)
        at org.gradle.wrapper.Install.createDist(Install.java:63)
        at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:109)
        at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:66)
error Failed to install the app. 

I know the error says that is a connection problem but I have checked all the possible applications that could be blocking it. I have completely disabled my firewall (I´m using windows 11). I´m running out of ideas. Any help would be deeply appreciated. I´m using Visual Studio Code but I have also tried with Android Studio and by typing the command directly on the PowerShell with the same result.

Update:

I changed the version of the gradle on the conf file for the one I have installed on my pc. Apparently, in that way the compilation process doesn´t have to download that and the previous error disappears. But now I get this one:

FAILURE: Build failed with an exception.

* Where:
Build file 'C:[email protected]' line: 13

* What went wrong:
Plugin [id: 'org.jetbrains.kotlin.jvm', version: '1.8.20'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (could not resolve plugin artifact 'org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin:1.8.20')
  Searched in the following repositories:
    MavenRepo
    Google
    Gradle Central Plugin Repository

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 10s
error Failed to install the app.

Maybe the problem is just that I´m still without connection for some strange reason???