Precisely this. Other commenters are pointing out that the Spanish government doesn't want to lose the option to investigate secessionist leaders, but given the

Precisely this. Other commenters are pointing out that the Spanish government doesn't want to lose the option to investigate secessionist leaders, but given the current good relationships between the socialist party and Puigdemont's, that makes no sense. More likely they're trying to gloss over the obvious blackmailing incident at the first opportunity to blame someone else for the lack of success of any investigation.