Mini Map just had an update itself. First, check the add-on settings just to make sure it’s not turned off (even though the add-on is still active).
After that, you may have a conflict with another add-on. Try to disable all add-ons except for Mini Map ... then reactivate each add-on one by one until you find the conflicting add-on.
Finally, be sure to post questions about add-ons in the right forums section for better visibility next time: