Here I have this line:

const _quantity = startPaymentFrontend?.products[productSlug]?.invoiceData?.[key2]

This here

startPaymentFrontend?.products[productSlug]

is a StartPaymentProduct

export interface StartPaymentProduct {
    pricingOptionId?: string
    passTypeId?: string
    quantity: number
    eventTimes?: { [eventTimeId: string]: StartPaymentProductEventTime }
    invoiceItems?: { [key: string]: number }
    teamSlug: string
}

Even developer environment recognize it.

which does not have invoiceData only invoiceItems.

Why running yarn build does not raise error on it?

This here is the tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "lib": ["dom", "dom.iterable", "esnext"],
        "allowJs": true,
        "skipLibCheck": true,
        "strict": true,
        "forceConsistentCasingInFileNames": true,
        "noEmit": false,
        "esModuleInterop": true,
        "module": "esnext",
        "moduleResolution": "node",
        "resolveJsonModule": true,
        "isolatedModules": true,
        "jsx": "preserve",
        "sourceMap": true,
        "importHelpers": true,
        "outDir": "./built"
    },
    "include": ["app/**/*", "index.d.ts", "index2.d.ts"],
    "exclude": ["node_modules"]
}

How can I force to raise error in those cases?!