Never provide identifiably information on the community, as it's an open public forum (not Atlassian Support)
Can you access the Jira on just using the main URL?
Key = name seems wring in the URL the key parameter should contain a work item id as Key=ABC-123
*URL(s) removed for privacy
Btw, this looks like a screen when you're not logged in to your Atlassian account (by the look of the sidebar 👀), and you try to access a site that you've previously visited. Might also be a good idea to check with your Jira/Org admins if licensing is okay (meaning, if you have the correct app license)
But as others said, the suggestion is to try a different browser or an incognito window to see if the issue persists there as well.
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Please try in different browsers and incognito mode. Disable browser extensions. Disable any cookies/ad-blocks.
If problem persists, you can contact Atlassian support via https://support.atlassian.com/.
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