I already used AMPScript in my emails but now for some reason when I try to send an email using that I received the error "There was an error sending this Email." I already reduce my code to test the send but the error still continue. At this moment I only use this:
%%[ Var @subscriberKey Set @subscriberKey = _subscriberKey ]%% %%= v(@subscriberKey) =%%
Any suggestion for what is happen?