Achievement Points
Is it possible you hit the 15,000 cap of Daily + Monthly points? In the achievement subpanel of the hero window, mouse over your total number of achievement points — it shows you the breakdown — if you’ve gotten 15,000 between daily & monthly, you won’t receive points for completing dailies.
(You should keep earning AP from other sources.)
If that’s not it, then:
- Start a support ticket — if there’s an issue, you’ll need their help. https://help.guildwars2.com/anonymous_requests/new
- While you are working with them, you might want to post a screen shot showing your “recently completed” achievements (and ideally, before|after shots that shows how you didn’t get AP after completing another achievement).
John Smith: “you should kill monsters, because killing monsters is awesome.”