Some people had problems with animated scenes on cell phones. That's why I asked. Usually the animation works fine on PC.
Build the police HQ, go there on the overview map, upgrade it, re-enter the map to finish the update, then go to the Aldlyn city board to get a note from the police officer Moriko. Her events will bring you to the thieves guild.
Did you have the event with Dea on the Amaranthe beach yet? If not, then you might still need to go there, or build the clinic on the overview map, or continue the events with Grey.
You need to unlock the beach for Neya as well.