When trying to open Goals in settings, the following error is displayed. Trying to open manage goals within a website causes the same error:
The following error just broke Matomo (v3.6.1):
Key "description" for array with keys "idsite, idgoal, name, match_attribute, allow_multiple, revenue, deleted, event_value_as_revenue" does not exist. in F:\Websites\Piwik\piwik\plugins\Goals\templates\_listGoalEdit.twig line 51
Unfortunately, I'm not sure if this appeared after the update to 3.6.1 or existed earlier, as I wasn't using goals much.