Exception: Uncaught TypeError: Cannot redefine property: googletag error when viewing Agile boards in Jira Server and Data Center
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Summary
When viewing Agile boards in Jira, the JavaScript error Uncaught TypeError: Cannot redefine property: googletag is displayed.
Environment
Jira Software Server/Data Center on any version from 9.0.0
Google Chrome with Stands Free AdBlocker installed
Cause
The googletag JavaScript property is associated with the Google Tag Manager, which is used by Google for advertising purposes.
However, Google Tag Manager is not bundled or included with Jira, so when Stands Free AdBlocker attempts to block it the result is a JavaScript error.
Solution
Configure Stands Free AdBlocker's whitelist and add your Jira system's base URL, so that Stands Free AdBlocker does not interfere with Jira.
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