Mariyadas,If the error is true, it can be extremely difficult to find problems in the PDF syntax and find them. If you can figure out that nature of what's wrong, we might be able to see what led to that. Can the PDF be opened in Acrobat? There are some fixup tools in Acrobat's Print Productions > P...

If packaging users, try adding this filter:exclude /home/users/.*/.tokensOtherwise, the .token may be from some other content (consult error log)Reference: https://helpx.adobe.com/experience-manager/kb/OakConstraint0027-error-when-migrating-users-and-groups-in-AEM.html

Double check the list of supported images. If the JPEG is CMYK (rare, but I just saw a case) that's not supported. You'll need to use RGB JPEG files. You can have this converted to CMYK later in the workflow.