I faced this issue while trying to sign the React Native app on my Windows 10 PC. Here is a solution to fix that error.
The most confusing part is the official guide for Android installation. It covers only linux/mac systems with instructions like “Edit ~/.gradle/gradle.properties” (tilda in the path is specific to unix-like OS).
Someone can think that this path is similar for “C:\Users\MY_USER\.gradle\gradle.properties“, but it’s not.
Resolving error Could not find property ‘MYAPP_RELEASE_STORE_FILE’
So, if you did not set gradle properties correclty, you will get the error when trying to realease the app:
Could not find property 'MYAPP_RELEASE_STORE_FILE'
This is caused by the first parameter of signing configuration in build.gradle file:
To fix that you need to set signing parameters into YOUR_PROJECT/android/gradle.properties. This is the correct place to set gradle params on Windows OS.
MYAPP_RELEASE_STORE_FILE=KEYSTORE_NAME.keystore MYAPP_RELEASE_KEY_ALIAS=YOUR_ALIAS MYAPP_RELEASE_STORE_PASSWORD=***** MYAPP_RELEASE_KEY_PASSWORD=*****