Cordova Android release builds Ajax not working

Ajax calls are not working only in release builds but are fine in debug builds. I'm doing all calls over https. There are no CORS errors. Note that the issue only appears on Android, not on iOS.

I use Let's Encrypt SSL certs on the back end.

 SHA256withRSA

I have tried every fix available on SO:

 <plugin name="cordova-plugin-enable-cleartext-traffic" space="^2.1.0" />  

I verified that I have android:usesCleartextTraffic="true" in manifest in the application node

I have added to config.xml

 <access origin="*" />    
 <allow-navigation href="*" />
 <preference name="AndroidInsecureFileModeEnabled" value="true" />

and also

 <edit-config xmlns:android="http://schemas.android.com/apk/res/android" file="app/src/main/AndroidManifest.xml" mode="merge" target="/manifest/application">
        <application android:networkSecurityConfig="@xml/network_security_config" />
 </edit-config>

And in res/xml created a file network_security_config.xml with content

 <?xml version="1.0" encoding="utf-8"?>
 <network-security-config>
      <domain-config cleartextTrafficPermitted="true">
           <domain includeSubdomains="true">mydomain.com</domain>
      </domain-config>
 </network-security-config>

I have verified that my Let's Encrypt SSL certificate is valid, it is. I do not have whitelist plugin anymore due to Android 10+

Version are

Cordova Android 10.1.1
Cordova 10.0.0

Tested on real device running Android 6.0.1 (have to support older phones)

Nothing seems to work. What can I try next?

Solution 1:

You should check if you get any CORS erros. If you run your app on file: you might need AndroidInsecureFileModeEnabled in config.xml

I suggest you to use the WebViewAssetLoader with cordova-android@10. Please check out the announcement https://cordova.apache.org/announcements/2021/07/20/cordova-android-10.0.0.html

Solution 2:

I will answer my own question, it might save someone A LOT of time. The issue is that I'm using let's encrypt SSL certificates on Windows Server via Win-Acme and I had been testing on Android 6.1.0. Following this post I just noticed that Let's Encrypt SSL certificates will not work anymore on Android < 7.1.1

Tested on Android 11 and it just worked.