Niantic confirms the Pokémon GO issue where Meloetta Masterwork Research “A Dazzling Aria” was unable to be gifted has now been resolved

Niantic is continuing to announce new events and content for Pokémon GO. Read on below to learn more:

Meloetta Masterwork Research, “A Dazzling Aria,” is Unable to be Gifted

Issue Description: Some Trainers attempting to purchase the Meloetta Masterwork Research “A Dazzling Aria,” as a gift are unable to send the Research to another Trainer. We have temporarily disabled the ability to send this research as a gift as we investigate.
Issue Status: Resolved. This ticket is now available to purchase as a gift for other Trainers.

Source: Official Pokémon GO blog

Source: Pokemon