We are sorry for your inconvenience.
We have been working over the examples in repo. Can you please try downloading the example from below link manually first by downloading zip archive.
If there is still an issue while synchronizing the examples from dashboard examples, please share with us and we will try to fix the issue ASAP on our end. Actually, we have released the new merged Aspose.Slides for Java API this month and previous examples have been discarded in live repos.