# API test against web service running in AKS fails with 'Connection refused' and lots of 'Could not resolve module' errors in the Katalon log when executed from Github Actions workflow

**URL:** <https://forum.katalon.com/t/api-test-against-web-service-running-in-aks-fails-with-connection-refused-and-lots-of-could-not-resolve-module-errors-in-the-katalon-log-when-executed-from-github-actions-workflow/63622>\
**Category:** Integrations\
**Tags:** integrations, katalon-studio\
**Created:** [March 23, 2022, 4:49pm UTC](https://forum.katalon.com/t/api-test-against-web-service-running-in-aks-fails-with-connection-refused-and-lots-of-could-not-resolve-module-errors-in-the-katalon-log-when-executed-from-github-actions-workflow/63622 "2022-03-23T16:49:52Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![duyluong](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/duyluong/32/1116_2.png) [@duyluong](https://forum.katalon.com/u/duyluong)\
**Post date:** [March 24, 2022, 11:02am UTC](https://forum.katalon.com/t/api-test-against-web-service-running-in-aks-fails-with-connection-refused-and-lots-of-could-not-resolve-module-errors-in-the-katalon-log-when-executed-from-github-actions-workflow/63622/2 "2022-03-24T11:02:21Z")

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> !SESSION 2022-03-23 13:28:20.132 -----------------------------------------------  
> eclipse.buildId=unknown  
> java.version=11.0.14.1  
> java.vendor=Eclipse Adoptium

You should use Java8 to run Katalon Runtime Engine.

> Unable to init server: Could not connect: Connection refused  
> Katalonc: Cannot open display:

The error shows that the machine is missing Xvfb that requires to run KRE on Linux.  
You can try with windows-latest machine. Please refer to this example:

> <https://github.com/katalon-studio/katalon-studio-github-action-test/blob/master/.github/workflows/blank.yml>

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