I want to compile an open source android project (Netguard) using gradel (gradlew clean build) But I encountered this Error:
A problem occurred
Android NDK 18.0* seems has an issue not creating all the files in folders after extraction. Due to it, your app compilation will fail which uses ndk builds.
Better is to use NDK 17.1* (https://developer.android.com/ndk/downloads/) etc version and you can extract or use the android studio extraction to ndk-bundle by default will work good.