# URGENT : Could not initialize class com.kms.katalon.core.webui.keyword.builtin.OpenBrowserKeyword **URL:** \ **Category:** Bug Report\ **Tags:** bugs-report, katalon-studio\ **Created:** [February 6, 2018, 8:53am UTC](https://forum.katalon.com/t/urgent-could-not-initialize-class-com-kms-katalon-core-webui-keyword-builtin-openbrowserkeyword/9269 "2018-02-06T08:53:57Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Hari](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/hari/32/28440_2.png) [@Hari](https://forum.katalon.com/u/Hari)\ **Post date:** [February 6, 2018, 8:53am UTC](https://forum.katalon.com/t/urgent-could-not-initialize-class-com-kms-katalon-core-webui-keyword-builtin-openbrowserkeyword/9269/1 "2018-02-06T08:53:57Z")
Hello, We are setting up AWS code pipeline to achieve CI and CD system for our project. While running Katalon script on ubuntu server through Docker container image, some reason Scripts are not running end to end and throwing below error. ```auto 02-05-2018 04:35:18 PM - [INFO] - Variable 'username' is set to andover202-05-2018 04:35:18 PM - [ERROR] - Test Cases/Login_Back_Office_TC_01 FAILED because (of) java.lang.NoClassDefFoundError: Could not initialize class com.kms.katalon.core.webui.keyword.builtin.OpenBrowserKeyword ``` Could you, please help us to resolve the issue. The execution details are as below, Katalon version - 5.3.0.1 JDK - 1.8 DISTRIB\_ID=Ubuntu DISTRIB\_RELEASE=17.04 DISTRIB\_CODENAME=zesty DISTRIB\_DESCRIPTION=“Ubuntu 17.04” NAME=“Ubuntu” VERSION=“17.04 (Zesty Zapus)” ID=ubuntu ID\_LIKE=debian PRETTY\_NAME=“Ubuntu 17.04” VERSION\_ID=“17.04” This issue is very much urgent for us to fix. Could any one reply a fix for this plesae. ---
**Author:** ![Ana\_Hong](https://avatars.discourse-cdn.com/v4/letter/a/ea5d25/32.png) [@Ana\_Hong](https://forum.katalon.com/u/Ana_Hong)\ **Post date:** [February 7, 2018, 2:56am UTC](https://forum.katalon.com/t/urgent-could-not-initialize-class-com-kms-katalon-core-webui-keyword-builtin-openbrowserkeyword/9269/2 "2018-02-07T02:56:59Z")
Which Docker image you are using? This issue can comes from either your setup or configurations or from the Docker image you are using or from your project. Regards ---
**Author:** ![Ana\_Hong](https://avatars.discourse-cdn.com/v4/letter/a/ea5d25/32.png) [@Ana\_Hong](https://forum.katalon.com/u/Ana_Hong)\ **Post date:** [February 7, 2018, 4:57am UTC](https://forum.katalon.com/t/urgent-could-not-initialize-class-com-kms-katalon-core-webui-keyword-builtin-openbrowserkeyword/9269/3 "2018-02-07T04:57:20Z")
Ah I’ve observed that using OpenJDK is a need for Linux version. You can check it by typing this in your terminal screen: ```auto java -version ``` ![](https://s3.amazonaws.com/katalon-forum/editor/le/p7ujynxd478w.png "Image: https://s3.amazonaws.com/katalon-forum/editor/le/p7ujynxd478w.png") \*\*If there is no **openJDK** information \*\*is displayed, then surely you will need to install it instead following this guide (enter command for JDK 8): [http://openjdk.java.net/install/index.html](http://openjdk.java.net/install/index.html) ---
**Author:** ![Hari](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/hari/32/28440_2.png) [@Hari](https://forum.katalon.com/u/Hari)\ **Post date:** [February 8, 2018, 9:43pm UTC](https://forum.katalon.com/t/urgent-could-not-initialize-class-com-kms-katalon-core-webui-keyword-builtin-openbrowserkeyword/9269/4 "2018-02-08T21:43:49Z")
Hi, We have fixed it somehow. But I think this issue still exists with Katalon and needs to be investigated. ---
**Author:** ![system](https://europe1.discourse-cdn.com/katalon/original/3X/d/5/d55596ab02785a255798e87ede769734747b30c4.svg) [@system](https://forum.katalon.com/u/system)\ **Post date:** [November 2, 2019, 4:42am UTC](https://forum.katalon.com/t/urgent-could-not-initialize-class-com-kms-katalon-core-webui-keyword-builtin-openbrowserkeyword/9269/5 "2019-11-02T04:42:45Z")
Closed on November 2, 2019, 4:42am UTC