# Preview TypeError - Next.js

**URL:** <https://community.prismic.io/t/preview-typeerror-next-js/15590>\
**Category:** Developing with Prismic\
**Tags:** nextjs, typescript, page-builder, slice-machine\
**Created:** [March 28, 2024, 9:44am UTC](https://community.prismic.io/t/preview-typeerror-next-js/15590 "2024-03-28T09:44:02Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![james10](https://avatars.discourse-cdn.com/v4/letter/j/77aa72/32.png) [@james10](https://community.prismic.io/u/james10)\
**Post date:** [March 28, 2024, 9:44am UTC](https://community.prismic.io/t/preview-typeerror-next-js/15590/1 "2024-03-28T09:44:02Z")

</div>

Prismic Preview in Next.js App router has suddenly stopped working across all projects on our local machines.

Accessing the /api/preview route resolves in the same error across all projects.

```auto
TypeError: Response body object should not be disturbed or locked

```

Versions`:

```auto
    "@prismicio/client": "^7.3.1",
    "@prismicio/next": "^1.5.0",
    "@prismicio/react": "^2.7.3",
    "next": "14.1.4",
    "@slicemachine/adapter-next": "^0.3.38",

```

---

<div class="post-metadata">

**Author:** ![james10](https://avatars.discourse-cdn.com/v4/letter/j/77aa72/32.png) [@james10](https://community.prismic.io/u/james10)\
**Post date:** [March 28, 2024, 1:53pm UTC](https://community.prismic.io/t/preview-typeerror-next-js/15590/3 "2024-03-28T13:53:50Z")

</div>

Suddenly resolved itself.