Work through these checks:
1. Client Config > Order: Subscription > Client can select meals? must be Yes; if No, the meals page redirects to My Subscription and only the kitchen/auto-select picks meals.
2. The subscription's General Settings > Lock Menu must be No; when Yes the customer sees "Menu Locked".
3. The delivery date must still be open: after the cutoff the customer sees Meal Selection Closed, and once every upcoming date is closed, Delivery Date Closed.
4. The date must be Open (not skipped/cancelled) and have meals left; otherwise they see Meals Already Selected.
5. The customer needs an active subscription with upcoming dates; otherwise they are sent to the plan chooser.
6. The menu for the date must contain meals that pass the customer's allergens/dislikes/category preferences, the subscription's Plan Categories filter and its Portion Size.
7. Account members whose parent pays can only reach the meal page at all if their Member can select included meals setting is on (or their account has checkout access to the Subscriptions Meals module); once on the page, that same setting limits them to included meals only, blocking any paid extra.
Meals already auto-selected for a plan with Auto Select Meals? can only be changed if swapping is allowed on the plan.