Work’s for me thanks dude.
I’m also unable to add the <edit-config> options to config.xml, but this solution worked!
This helped, thanks mate!
Worked for me. Thanks!
Just Replace this:
<application android:networkSecurityConfig="@xml/network_security_config" />
and Add this:
<application android:usesCleartextTraffic="true" />
Example:
<edit-config file="app/src/main/AndroidManifest.xml" mode="merge" target="/manifest/application" xmlns:android="http://schemas.android.com/apk/res/android">
<application android:usesCleartextTraffic="true" />
</edit-config>
I hope to solve your problem.
Where is the config.xml ?
i just run this command :
ionic cordova run android -l --ssl
Add this line in config,xml for android, then remove platform and add it again then try
It should work
Adding domain tag worked for me 
This one did the job for me.
For anyone encountered this on capacitor, open capacitor.config.json then inside the server object, just add “cleartext”: true
for reference:
Worked for me, thank you!
Is it possible to add a wildcard?
For example I don’t know the IP of the device up front, but it will be something like 192.168.x.x
I actually need to do something like: 192.168.*
But that doesnt work.
I can add a static IP and that resolves the error, but it needs to be a wildcard.
Any thoughts?
Worked for me, thank you!
adding domain tag worked for me.
<domain>192.168.0.5<domain>
in
resources/android/xml/network_security_config.xml
Thank you very much, this problem was giving me headaches.
It’s lovely to see even after 4 years people can resolve their issues with a few lines of text you’ve written 
I haven’t been working with Ionic for so long time now and cannot even remember writing these stuff.
ionic and its issues never rust 
Greetings!