Translation:They understood that something bad had probably happened.
"Probably" is even the main translation. It depends on the whole sentence we don't see what you wrote. But most likely :-) you should have used the "Report" button so that your correct translation can be added.
"pochopily" should be accepted as well.Can't report it because after pressing the report button I am not offered the respective option (probably because my answer was "accepted with typo").