The following assertion was thrown building AnimatedContainer(duration: 250ms, Alignment.center, padding: EdgeInsets.zero, bg: BoxDecoration(color: Color(0xff6262d5), borderRadius: BorderRadius.circular(10.0)), margin: EdgeInsets.all(6.0), clipBehavior: Clip.none, dirty, state: _AnimatedContainerState#d3f3a(ticker active, AlignmentGeometryTween(Alignment.center → Alignment.center), padding: EdgeInsetsGeometryTween(EdgeInsets.zero → EdgeInsets.zero), bg: DecorationTween(BoxDecoration(shape: circle) → BoxDecoration(color: Color(0xff6262d5), borderRadius: BorderRadius.circular(10.0))), margin: EdgeInsetsGeometryTween(EdgeInsets.all(6.0) → EdgeInsets.all(6.0)))): 'package:flutter/src/painting/box_decoration.dart': Failed assertion: line 128 pos 12: 'shape != BoxShape.circle || borderRadius == null': is not true.

[ShiyanaSam]

Describe the bug
A clear and concise description of what the bug is.

To reproduce
Please include a short code sample that can be used to reproduce the problem.
TableCalendar(

                      calendarStyle: CalendarStyle(
                        todayTextStyle: AppTextStyles.n14w600.black,
                        todayDecoration:
                            const BoxDecoration(borderRadius: null),


                        rangeHighlightColor: AppColors.progressBackground,
                        rangeStartTextStyle: AppTextStyles.n14w600.white,
                        rangeEndTextStyle: AppTextStyles.n14w600.white,
                        rangeStartDecoration: BoxDecoration(
                          borderRadius: BorderRadius.circular(10),
                          color: AppColors.primaryLightPurple,
                  
                        ),
                        rangeEndDecoration: BoxDecoration(
                          color: AppColors.primaryLightPurple,
                          borderRadius: BorderRadius.circular(10),
                        ),
                      ),
                      rowHeight: 40,
                      currentDay: DateTime.now(),
                      focusedDay: DateTime.now(),
                      firstDay: DateTime(2000),
                      lastDay: DateTime.now(),
           
                      onFormatChanged: (format) {
            
                      },
                      onPageChanged: (focusedDay) {
                        _focusedDay = focusedDay;
                      },
                      rangeEndDay: _rangeEnd,
                      rangeStartDay: _rangeStart,
                      rangeSelectionMode: RangeSelectionMode.toggledOn,
                      onRangeSelected: _onRangeSelected,
                      headerStyle: HeaderStyle(
                        titleCentered: true,
                        titleTextStyle: AppTextStyles.n16w700,
                        formatButtonVisible: false,
                      ),
                      daysOfWeekStyle: DaysOfWeekStyle(
                        weekdayStyle: AppTextStyles.n12w700.primaryPurple,
                        weekendStyle: AppTextStyles.n12w700.primaryPurple,
                      ),
                    ),

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Output of flutter doctor
Paste the result of this command here.
The following assertion was thrown building AnimatedContainer(duration: 250ms, Alignment.center, padding: EdgeInsets.zero, bg: BoxDecoration(color: Color(0xff6262d5), borderRadius: BorderRadius.circular(10.0)), margin: EdgeInsets.all(6.0), clipBehavior: Clip.none, dirty, state: _AnimatedContainerState#d3f3a(ticker active, AlignmentGeometryTween(Alignment.center → Alignment.center), padding: EdgeInsetsGeometryTween(EdgeInsets.zero → EdgeInsets.zero), bg: DecorationTween(BoxDecoration(shape: circle) → BoxDecoration(color: Color(0xff6262d5), borderRadius: BorderRadius.circular(10.0))), margin: EdgeInsetsGeometryTween(EdgeInsets.all(6.0) → EdgeInsets.all(6.0)))): 'package:flutter/src/painting/box_decoration.dart': Failed assertion: line 128 pos 12: 'shape != BoxShape.circle || borderRadius == null': is not true.

Additional context
Add any other context about the problem here.

[zhangjinhuang]

you need to set all decoration

[aleksanderwozniak]

Looks like duplicate of #583