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PPTX to PDF Save Error: class com.aspose.slides.PptxReadException

The issue has been resolved. A fix will be included in Aspose.Slides 22.6. This release will be published in the second half of June.

The issues you have found earlier (filed as SLIDESJAVA-38719) have been fixed in Aspose.Slides for Java XX.X (ZIP).
You can check all fixes on the Release Notes page.
You can also find the latest version of our library on the Product Download page.