Answers for "NDK at Android\sdk\ndk\21.0.6113669 did not have a source.properties file"

NDK at /Users/Library/Android/sdk/ndk/21.1.6352462 did not have a source.properties file

#1- In build.gradle file add ndkVersion
android {
        ndkVersion '21.1.6528147'
    }
#2- In local.properties remove ndk.dir
ndk.dir=~/Library/Android/sdk/ndk-bundle

NDK at Library/Android/sdk/ndk-bundle did not have a source.properties file

After specifying ndk version in build.gradle file it is working

android {
        ndkVersion '21.3.6528147'
    }
And inside local.properties remove the following since it's deprecatedand also conflicts with path:

ndk.dir=~/Library/Android/sdk/ndk-bundle