Which library version are you using? E.g. 3.2.0.
Which phone/tablet are you using, and which Android version does it run? (e.g. Samsung Galaxy S5, Android 5.0)
Does the same happen on other devices or an emulator?
Can you reproduce the issue in the sample project included with the library? If not, can you provide your own sample project or sample code that produces this error?
In the case of an error do you have a stack trace or adb logs?