This started happening in the 18.8.0 release.
Frustrating… In every update something breaks.

System.IO.InvalidDataException: ‘Chart series names must be unique. More than one series named as “”.’ (348.0 KB)


I have worked with presentation shared by you and have been to reproduce the issue. An issue with ID SLIDESNET-40560 has been created in our issue tracking system to investigate and resolve the issue. This thread has been linked with thw issue so that you may be notified once the issue will be fixed.

The issues you have found earlier (filed as SLIDESNET-40560) have been fixed in this update.