"null" directory created after Gradle task run

[saintjab]

Hey, thanks for this plugin. It could be a real alternative to Frameit from Fastlane. After couple of setup struggles, I am finally able to run the Gradle task for it. However whenever I run the task ./gradle frames, I get no error but sees a folder named null created with nothing in it. I have also tried by manually creating output dir but still same problem. Could you please help find out what's am doing wrong? or an alternative. Thanks