# Custom App SSO Error

**URL:** <https://community.dynatrace.com/t/custom-app-sso-error/40885>\
**Category:** Developer Q&A Forum\
**Tags:** custom-app\
**Created:** [July 26, 2023, 3:27pm UTC](https://community.dynatrace.com/t/custom-app-sso-error/40885 "2023-07-26T15:27:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![amita](https://avatars.discourse-cdn.com/v4/letter/a/838e76/32.png) [@amita](https://community.dynatrace.com/u/amita)\
**Post date:** [July 26, 2023, 3:27pm UTC](https://community.dynatrace.com/t/custom-app-sso-error/40885/1 "2023-07-26T15:27:06Z")

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Hi,

I am trying to create custom app on my windows local server.However&nbsp;getting issue while running **npm run start**  
**Error: Could not resolve the SSO-URL for ‘’**  
**Http(s) request failed: getaddrinfo ENOTFOUND**

My node js version is 18.15

Also I have setup org proxy in Environment variable in below format

```auto
export HTTP_PROXY=<your proxy>
export HTTPS_PROXY=<your proxy>

```

Still the issue persist

-Amita

---

<div class="post-metadata">

**Author:** ![tomislav\_zorcec](https://avatars.discourse-cdn.com/v4/letter/t/dbc845/32.png) [@tomislav\_zorcec](https://community.dynatrace.com/u/tomislav_zorcec)\
**Post date:** [July 27, 2023, 10:44am UTC](https://community.dynatrace.com/t/custom-app-sso-error/40885/2 "2023-07-27T10:44:55Z")

</div>

Hello Amita, thank you for reaching out to us.

Similar cases were previously resolved by setting the mentioned environment variables.  
Possibly related issue:&nbsp;[https://community.dynatrace.com/t5/Developer-Q-A-Forum/SSO-URL-error-when-starting-the-dev-server/td-p/204662](https://community.dynatrace.com/topic/204662)

Since in your case this did not help, we would like to have a more detailed look into your issue, and I kindly ask you to create a support ticket via&nbsp;[https://one.dynatrace.com/hc/en-us/requests](https://one.dynatrace.com/hc/en-us/requests)&nbsp;.