World Achivements Turned Off When It Never Had Anything Related To Cheats Or Creative Or Behavior Packs

My Sisters Minecraft Survival World That Was For Survival With Both Me And My two Little Sisters. We worked on this since June 22nd and never did cheats,creative,Behavior Packs,ect, but all of a sudden, at the top it said "achievements cannot be earned" could you please fix this and maybe re-nable achievements if you can. 😭😭😭 Or can you please tell us how we can get achievements turned back on? Please tell us theres a fix we are so sad!!