Could you please upgrade to the latest versions ofAdobe Acrobat Reader DC and Adobe Acrobat DC and see if the issue is resolved. By updating installations to the latest versions, users benefit from the latest functional enhancements and improved security measures.
What's the exact version number of the application (You can find it out by going to Help - About Adobe Acrobat)? What's your OS version?
Acrobat X is an old and outdated version, so it's not surprising that this kind of error happens if you're running it on a current operating system, like Windows 10.