TypeError: Error #1009: Cannot access

For some GD reason I keep getting this error and I dont know why.

TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at components.alpharaven::Frame/SetSize()
    at framework/::StartAnimation()

I am attaching the files for reference. CAN SOMEONE PLEASE HELP!!!. I cant seem to figure out the reason why its happening. Everything seems fine to me.