Reason & Solution:
1. The network permission is not enabled
2 HTTP is not supported
Add network permissions to AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />If the error is still reported, add the following to the Application in the AndroidManifest.xml file
android:usesCleartextTraffic="true"Reason: On Android 9.0 machines, http access is not supported by default, all network access must use https. of course Android has supported https in several earlier versions, except that http is not supported by default using https on 9.0.
If the above operation can not be solved, please uninstall the application first, and then run it again.
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