Clearing cache and restarting browser did not fix this issue.
When opening a new browser I can log in to id.atlassian.net without issues, but I am taken to the ~company~.atlassian.net Jira page where I am no longer logged in. Clicking the "Log In" button in the bottom left corner just refreshes the page, where I am still logged out. Clicking any other button results in a text window that says: "Something's gone wrong. Our team has been notified... etc."