Hello,
What version of SEP 12.1 have you installed? Is that SEP 12.1 RTM or SEP 12.1RU1?
Could you Attach the screenshot of the issue?
In case, you are carrying the older version of SEP 12.1 RTM, would it be please migrate to the Latest version of SEP 12.1 RU1 and check if that resolves the issue.
Hope that helps!!