Can't configure Zendesk Support for Jira

After installing Zendesk Support for Jira, when I am trying to configure the plugin it takes me to following URL: https://jiraplugin.zendesk.com/integrations/jira/oauth/finish?code=<CODE>&state=<ZENDESK_SUBDOMAIN>

But above URL opens up in a new browser tab and gives following error message: 

HTTP 404: This jiraplugin.zendesk.com page can’t be found

Does anyone know if there are issues with Zendesk Support for Jira plugin?