Hope you are doing well and sorry for the trouble. As described you are getting the error 'Cannot find or create the font 'AIGDT'. Some character may not display or print correctly'
Would you mind sharing the version of the Acrobat Std XI you are using. To check the version go to Help > About Acrobat and make sure you have the application updates to the last version 11.0.23 Go to Help > Check for updates and reboot the computer once. you may also download the patch manually from the link https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotes/index.html