hey devs im trying to render a not found page using this function notFound() im using it in a middleware

.
├── app/
│   └── not-found.tsx
└── lib/
    └── supabase/
        └── middleware.ts

and the error is being called but im not getting the page rendered

just this error:

Error: NEXT_NOT_FOUND
    at notFound (webpack-internal:///(middleware)/./node_modules/next/dist/esm/client/components/not-found.js:22:19)
    at updateSession (webpack-internal:///(middleware)/./lib/supabase/middleware.ts:66:66)
    at async Object.middleware [as handler] (webpack-internal:///(middleware)/./middleware.ts:9:12)
    at async adapter (webpack-internal:///(middleware)/./node_modules/next/dist/esm/server/web/adapter.js:179:16)
    at async (file://C:\Users\diogo\Desktop\Projetos\memobox\node_modules\next\dist\server\web\sandbox\sandbox.js:110:22)
    at async runWithTaggedErrors (file://C:\Users\diogo\Desktop\Projetos\memobox\node_modules\next\dist\server\web\sandbox\sandbox.js:107:9)
    at async DevServer.runMiddleware (file://C:\Users\diogo\Desktop\Projetos\memobox\node_modules\next\dist\server\next-server.js:1062:24)
    at async DevServer.runMiddleware (file://C:\Users\diogo\Desktop\Projetos\memobox\node_modules\next\dist\server\dev\next-dev-server.js:268:28)
    at async NextNodeServer.handleCatchallMiddlewareRequest (file://C:\Users\diogo\Desktop\Projetos\memobox\node_modules\next\dist\server\next-server.js:324:26)
    at async DevServer.handleRequestImpl (file://C:\Users\diogo\Desktop\Projetos\memobox\node_modules\next\dist\server\base-server.js:822:28)