# \`Unexpected "type"\` error when running yarn start on a app-platform DHIS2 application

**URL:** <https://community.dhis2.org/t/unexpected-type-error-when-running-yarn-start-on-a-app-platform-dhis2-application/65250>\
**Category:** App Development\
**Tags:** app-platform\
**Created:** [2 June 2025 07:50 UTC](https://community.dhis2.org/t/unexpected-type-error-when-running-yarn-start-on-a-app-platform-dhis2-application/65250 "2025-06-02T07:50:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![nnkogift](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/nnkogift/32/42239_2.png) [@nnkogift](https://community.dhis2.org/u/nnkogift)\
**Post date:** [2 June 2025 07:50 UTC](https://community.dhis2.org/t/unexpected-type-error-when-running-yarn-start-on-a-app-platform-dhis2-application/65250/1 "2025-06-02T07:50:00Z")

</div>

Hello,

When starting a DHIS2 application bootstrapped with the latest app platform tools, the error ` Unexpected "type"` appears, and the application does not run. The error seems to originate from `node_modules/@dhis2/app-service-data/build/es/index.js:4:7`

Here is a screenshot for reference:

 ![Screenshot 2025-06-02 at 10.43.41](https://dhis2.b-cdn.net/uploads/default/original/3X/a/2/a29c199a15cad09cc95ad222fb842598a2a547b3.png)

Versions:

- @dhis2/cli-app-scripts: 12.6.1
- @dhis2/app-runtime: 3.14.2

---

<div class="post-metadata">

**Author:** ![kpvandivier](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/kpvandivier/32/36689_2.png) [@kpvandivier](https://community.dhis2.org/u/kpvandivier)\
**Post date:** [2 June 2025 11:21 UTC](https://community.dhis2.org/t/unexpected-type-error-when-running-yarn-start-on-a-app-platform-dhis2-application/65250/2 "2025-06-02T11:21:32Z")

</div>

Thanks for the report @nnkogift! This turned up with `@dhis2/app-runtime` 3.14.2, and should be fixed with version 3.14.3 🙂

---

<div class="post-metadata">

**Author:** ![nnkogift](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/nnkogift/32/42239_2.png) [@nnkogift](https://community.dhis2.org/u/nnkogift)\
**Post date:** [2 June 2025 11:23 UTC](https://community.dhis2.org/t/unexpected-type-error-when-running-yarn-start-on-a-app-platform-dhis2-application/65250/3 "2025-06-02T11:23:50Z")

</div>

Thanks @kpvandivier for the prompt fix!