There is an issue always that I click "Backlog" inside a project. below the details

[Jorge Carrasco]

An error occurredHide…

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Details

1. • Exception: Uncaught TypeError: c.isEpicsPanelEnabled is not a function
   • Resource: http://mockit400services.ddns.net/jira/s/10e5fab937d81c50d13ec1004c434da7-CDN/nklc5z/712001/b6b48b2829824b869586ac216d119363/d4d724dc8649dfa35595e38354a1bb99/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&baseurl-check-resources=true&healthcheck-resources=true&is-server-instance=true&is-system-admin=true&jag=true&jaguser=true&jira...
   • Line: 10095
   • Column: 589

Environment

Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Stack trace

• TypeError: c.isEpicsPanelEnabled is not a function
• at e (http://mockit400services.ddns.net/jira/s/10e5fab937d81c50d13ec1004c434da7-CDN/nklc5z/712001/b6b48b2829824b869586ac216d119363/d4d724dc8649dfa35595e38354a1bb99/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&baseurl-check-resources=true&healthcheck-resources=true&is-server-instance=true&is-system-admin=true&jag=true&jaguser=true&jira...)
• at d.f [as filterOutGHEpics] (http://mockit400services.ddns.net/jira/s/10e5fab937d81c50d13ec1004c434da7-CDN/nklc5z/712001/b6b48b2829824b869586ac216d119363/d4d724dc8649dfa35595e38354a1bb99/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&baseurl-check-resources=true&healthcheck-resources=true&is-server-instance=true&is-system-admin=true&jag=true&jaguser=true&jira...)

[Petter Gonçalves]

Hello Jorge,

Have you updated your JIRA recently?

It seems that you are facing the error regarding the article below:

JIRA throws "Exception: Uncaught Error" when accessing boards

Less probable, your issue can also be caused by the following problem: 
Cannot access Agile board: undefined is not a function or TypeError: Cannot read property 'prototype' of undefined

Let me know if any of the workarounds above have worked for you.