Without a more detailed description of your issue, I'm assuming that you're receiving 404 error codes when trying to view the Source and Review tabs in a JIRA issue, is that right?
This will happen if FishEye is disabled, but a fix was applied since FishEye/Crucible version 3.6.2 so commits information is displayed in the Development Panel (please see https://jira.atlassian.com/browse/CRUC-6962 for more information on this). Please notice that this fix was applied for the Development Panel only, so the 404 error will persists even with most recent versions of FishEye/Crucible. That being said, please make sure the connection between JIRA and FishEye/Crucible is properly set, having an Application Link configured with the OAuth authentication method only, so the Development Panel is displayed.
In case you're not familiar with the Development Panel, please check it at https://confluence.atlassian.com/jira/viewing-the-code-development-information-for-an-issue-445186939.html
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