FATAL EXCEPTION: OkHttp Dispatcher

This is caused by using different versions of OkHttp. Ensure all your dependencies from com.squareup.okhttp3 are using the same version.

example:

implementation 'com.squareup.okhttp3:logging-interceptor:3.8.0'
implementation 'com.squareup.okhttp3:okhttp:3.8.0'

Response body can be consumed only once. You make it twice

Log.v(TAG, response.body().string());
String jsonData = response.body().string();

More info in docs

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