# Unable to load class

**URL:** <https://devforum.okta.com/t/unable-to-load-class/15467>\
**Category:** Questions\
**Created:** [August 10, 2021, 12:27pm UTC](https://devforum.okta.com/t/unable-to-load-class/15467 "2021-08-10T12:27:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![windking](https://avatars.discourse-cdn.com/v4/letter/w/ea5d25/32.png) [@windking](https://devforum.okta.com/u/windking)\
**Post date:** [August 10, 2021, 12:27pm UTC](https://devforum.okta.com/t/unable-to-load-class/15467/1 "2021-08-10T12:27:16Z")

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Hi

Constructor threw exception; nested exception is com.okta.commons.lang.UnknownClassException: Unable to load class named [com.okta.authn.sdk.impl.client.DefaultAuthenticationClientBuilder] from the thread context, current, or system/application ClassLoaders. All heuristics have been exhausted. Class could not be found.

I get this error when I use this as it says in your documentation;

AuthenticationClient client = AuthenticationClients.builder()  
.setOrgUrl(“[https://dev-08103053.okta.com/](https://dev-08103053.okta.com/)”)  
.build();

How to resolve this?

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**Author:** ![sigama](https://sea1.discourse-cdn.com/oktadev/user_avatar/devforum.okta.com/sigama/32/5811_2.png) [@sigama](https://devforum.okta.com/u/sigama)\
**Post date:** [August 10, 2021, 10:16pm UTC](https://devforum.okta.com/t/unable-to-load-class/15467/2 "2021-08-10T22:16:58Z")

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Hi @windking! Please share what your dependencies - [GitHub - okta/okta-auth-java: okta-auth-java](https://github.com/okta/okta-auth-java#getting-started) look like.

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**Author:** ![andrea](https://sea1.discourse-cdn.com/oktadev/user_avatar/devforum.okta.com/andrea/32/2172_2.png) [@andrea](https://devforum.okta.com/u/andrea)\
**Post date:** [February 12, 2024, 9:02pm UTC](https://devforum.okta.com/t/unable-to-load-class/15467/3 "2024-02-12T21:02:36Z")

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