Delete such characters and type them (instead of copy-pasting them from source). Republish the project.
This error can occur for any or all of the following reasons:
- The 64-bit JVM is corrupted.
- Invalid characters are present in text fields such as Project Information, Email, Description, Name, and Slide Name in your project.
- You have used AS3 methods or variable names such as button names (Play/Pause) in the text fields.