A new report is suggesting that the confirmed login issues related to the Pokémon Global Link (PGL) might have been a cause of the unsuccessful first and second global missions in Pokémon Sun and Moon. In order to sync your game progress online, you need a Pokémon Trainer Account, which will then give you access to the PGL. However, a number of players can’t even register and log in to PGL, which logs progress in global missions. The third global mission – officially titled “Trade Pokémon at the GTS!” – is currently underway and is the first successful one.
Source: Kotaku
Pokémon Blog 