Problem with save as in Acrobat X Pro 10.1.16

++ adding on to the above response.

Acrobat X is an ancient version of Acrobat series, which is no longer supported. Win-11 is an updated OS; Acrobat 11 has not been tested on the latest OS. 

Hence, there would be a compatibility issue. Or there's likely a chance that it will not work on 11 at all.

Though we recommend upgrading your Acrobat to the latest version, which is compatible with Win-10 and later.

https://helpx.adobe.com/acrobat/kb/end-of-support-acrobat-xi-reader-xi.html 

Thanks,

Akanchha

Should be, but Acrobat X is outdated and not compatible with Windows 11, so problems are to be expected.