Preconditions (*)

1. v2.4.3

Steps to reproduce (*)

1. Install magento v2.4.3 by using composer
2. Go to /admin_XXXXXX which is a unique admin url that generated by magento
3. Login with your admin credentials

Expected result (*)

1. If login successful, it should show dashboard without any error

Actual result (*)

1. Dashboard loads with an error -> Invalid security or form key. Please refresh the page.
2. https://www.dropbox.com/s/i5c3epqcuh5mhjw/Screen%20Shot%202021-08-11%20at%2014.42.11.png?dl=0

Network section of browser, filtered by doc

1. /admin_XXXXXX POST 302 found
2. /admin_XXXXXX/admin_XXXXXX/index/index/key/XXXXXX/ GET 302 found
3. /admin_XXXXXX/admin/dashboard/index/key/XXXXXX/ GET 200 OK

Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.