Cannot read properties of null (reading 'match') in getCalendarType()

[BijinDev]

Error message:
null is not an object (evaluating 'e.match')
Stacktrace:
wl@asset://app/date-7sWw82XX.js:1:146144
kl@asset://app/date-7sWw82XX.js:1:146346
onPressedEditCalendar@asset://app/calendar-view-BzGXHdAx.js:1:52759
@asset://app/gui-base-Q8mmr0Km.js:1:112979
@asset://app/app.js:1:24488
App version:
253.241203.1
Client type:
Ios
Additional info:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)

which decodes to

  at wl match (../../src/common/calendar/date/CalendarUtils.ts:1011:33)
  at kl groupSettings (../../src/common/calendar/date/CalendarUtils.ts:1033:26)
  at onPressedEditCalendar existingGroupSettings (../../src/calendar-app/calendar/view/CalendarView.ts:1002:33)
  at e (../../src/common/gui/base/Dropdown.ts:250:16)
  at ev (../libs/mithril.js:1022:61)