Exception InvalidStateError
exception InvalidStateError
Extends com.amazon.apmf.BaseError
Possible causes of this error are
API is called in invalid state.
The existing MediaKeys object cannot be removed at this time.
The session has already been used.
The session is not yet initialized.
The session is closed.
For more detail see
https://www.w3.org/TR/encrypted-media/#dfn-InvalidStateError