Are you unable to see a sub-calendar you usually have access to?
If a sub-calendar is missing from your view be sure to check that it isn't toggled off in the calendar list.
Check the Calendars list in the left sidebar
Temporarily hidden sub-calendars have white lines on their colored name bar, so you can see at a glance which sub-calendars hidden and which are currently shown.
In the example below, you can see that Mark's calendar is not visible in the calendar view:
To show a hidden calendar, click on the calendar's name bar. All events for that sub-calendar will then be displayed:
Check the sub-calendar filter in the left sidebar
Events can also be filtered by calendar as seen here.
The sub-calendar filter is being used to show events from Frank, Linda, and Sandy's sub-calendars only. If a sub-calendar's events are missing from your view be sure to check the filters.
How to check on the Teamup app
These examples show the calendar list and filters in a browser. Sub-calendars can also be toggled in the Teamup app. To check, swipe to open the left sidebar and view the list of calendars. Tap the eye icon at the top to bring all sub-calendars into view.
To clear filters, tap the magnifying glass icon in the top right. If you have any filters active, there will be a red Clear filter option at the bottom. Tap it to clear filters and see all data in your view again.