AdropErrorCode

Code	Description
network	The network status is unstable.
internal	Exception in SDK.
initialize	Initialize Adrop first before you act something.
invalidUnit	Ad unit ID is not valid.
inactive	There are no active advertising campaigns.
adNoFill	Unable to receive ads that meet the criteria. Please retry.
adLoading	Waiting ad response from server after request ad.
adDuplicated	You can't load again after ad received successfully.
adEmpty	Unable to show ad before ad received.
adShown	This ad was shown already.
undefined	undefined error.