@Matt-Nelson In Monaca projects, you can only make changes within www folder. For this reason, you need to use the cordova-plugin-copy-resources plugin to make changes to project files outside of www folder. These changes will be effective after the build. In your case, please do as follows: Add cordova-plugin-copy-resources plugin into your project. Within config.xml, change the following line: <resource-file src="/res/android/drawable-mdpi/ic_stat_onesignal_default.png" target="res/drawable-mdpi/ic_stat_onesignal_default.png" /> to <resource dest="res/drawable-mdpi/" src="www/images/ic_stat_onesignal_default.png" /> Note: You need to put your images source files within www folder such as images folder. This should fix your build issue.