Constraints: BoxConstraints(w=882.0, h=30.0)
Size: Size(882.0, 29.0)

If you are not writing your own RenderBox subclass, then this is not your fault. Contact support: https://github.com/flutter/flutter/issues/new?template=2_bug.md

The relevant error-causing widget was:
_RangeSelectorRenderObjectWidget syncfusion_flutter_sliders/lib/src/range_selector.dart:1445:12
When the exception was thrown, this was the stack:
#0 RenderBox.debugAssertDoesMeetConstraints. (package:flutter/src/rendering/box.dart:2224:9)
#1 RenderBox.debugAssertDoesMeetConstraints (package:flutter/src/rendering/box.dart:2309:6)
#2 RenderBox.size=. (package:flutter/src/rendering/box.dart:2001:7)
#3 RenderBox.size= (package:flutter/src/rendering/box.dart:2003:6)
#4 _RenderRangeSelector.performLayout (package:syncfusion_flutter_sliders/src/range_selector.dart:2803:5)

_RenderRangeSelector does not meet its constraints.
The relevant error-causing widget was:
_RangeSelectorRenderObjectWidget
syncfusion_flutter_sliders/lib/src/range_selector.dart:1445:12