Cache Steam Achievements not working

Does anyone got the GetCachedAchievementProgress function working? For some reason it always fails to find the Achievements for me. I can write the achievement progress though, but to add to the progress I need the current progress value don’t I? Thanks!

Slightly different problem, but the CacheAchievements node doesn’t work for me. Always fails. Steam overlay is working correctly, and using my own AppID. Anybody got any ideas?

Jackson