Undefined is not an object(evaluating props.topOffset[props.startPosition])

[EmreKayaoglu]

I install react-native-draggable-list for my project and I followed all instructions for using.
But I got error as following:
Undefined is not an object(evaluating props.topOffset[props.startPosition])

What do I have to do that?

[mohfoad]

I also met the above issue.
How to fix it?
Please let me know. thanks