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Cause 1: Jira behind SSO or 2FA solution
See this dedicated support article related to Single Sign On solutions: Connect with SSO
Cause 2: App not installed in Jira
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Problematic headers your reverse proxy should not set on the response are:
Header | Value |
|---|---|
X-Frame-Options | SAMEORIGIN |
Content-Security-Policy | frame-ancestors 'self' |
As of Jira 7.6 these headers are not necessary anymore to add by the reverse proxy because Jira automatically sets them: https://confluence.atlassian.com/jirakb/security-headers-in-jira-939919914.html
Solution
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