Build in Android Studio occur exception

[feer921]

Error:(17, 0) Could not find property 'VERSION_NAME' on root project 'ExpandableLayout'.
Open File

[JitenNumberTank]

Error:(17, 0) Could not find property 'VERSION_NAME' on root project 'ExpandableLayout'.
Open File

[backids99]

Please try (for version 1.3) :

Step 1: build.gradle (project)
version = VERSION_NAME
group = GROUP
Change To :
version = 1.3
group = 'com.github.traex.expandablelayout'

Step 2: build.gradle (library)
Remove this line :
apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'