I have been using the plugins wipe-schedule which works smoothly, but it has a default settings of displaying info on timer in HOURS.
The setting is 

{
  "AnnounceOnJoin": true,
  "AnnounceOnTimer": true,
  "AnnounceTimer": 1,
  "DateFormat": "MM/dd/yyyy",
  "DaysBetweenWipes": 14,
  "LastWipe": "09/07/2019",
  "NextWipe": "09/20/2019",
  "UseManualNextWipe": false
}​

AnnounceonTimer is 1 which means 1 hour. How can I change it to minute. Lets say I want to change it to 30 min. Will making it 0.5 work?
there is no changing to minute tips or guide on description.
thank you

Edit- Changing it to 0.5 and reloading plugins throwsback "Failed to initialize plugin 'WipeSchedule v2.0.4' (JsonReaderException: Input string '0.1' is not a valid integer. Path 'AnnounceTimer', line 4, position 22.)"
error