// add this in your request header

'Content-Type': 'multipart/form-data'

​

// comment this line in android/app/src/main/java/package_name/MainApplication.java

initializeFlipper(this, getReactNativeHost().getReactInstanceManager());

​

// comment this line in android/app/src/main/java/package_name/ReactNativeFlipper.java

builder.addNetworkInterceptor(new FlipperOkhttpInterceptor(networkFlipperPlugin));