Error 2018 Page Margins too large when running reports

Log in as ADMIN---> Go to Company --> Preferences --> Reports, make sure Apply Default Printer is unchecked.

Try to edit the printer preferences by switching from landscape to portrait or vice verse depending on what the setting is now.

Go to Reports -> Design Reports -> click on the report that is causing the error -> then go to View -> Report Properties -> change the page size to Custom and Save (after you change your preferences above)

Also, check the default printer settings in Windows.