Dear Joseph,
Thanks for your inquiry.
After an initial testing, sorry that I didn't encounter any issue when loading file. Please try to use the latest
Spire.Presentation Pack Hotfix Version:2.8.21 and check if the issue is solved on your side. If the issue still exists, please provide us with following information for investigation.
1) Input file and the code you were using
2) Region and Language setting, e.g. China, Chinese
3) OS information
Many thanks,
Betsy
E-iceblue support team