Hi David,
We are able to reproduce the issue "An exception is
thrown when a range is added dynamically" in the Circular Gauge
component. However, we have considered this as a defect and logged a defect
report for the same. The fix will be included in our 2023 Volume 1 release,
which is expected to be available by the end of March, 2023. You can track the
status of the reported issue using the below feedback link.
https://www.syncfusion.com/feedback/41826