Why do I get an 'Outcome Limit Exceed' error when placing a bet?

If you encounter an “Outcome Limit Exceed” error, here are the possible reasons:

-You are attempting to place opposing bets on the same event.
-You are trying to place a bet on a completed event.
-Your potential winnings from this event exceed the maximum limit.
-You have too many selections (outcomes) for this event, so try removing one of the outcomes from your bet slip.