Unable to print or email from Sage 50 Accounting.

Run the program with administrative rights on affected workstations

See How can I make the program run as administrator by default?

Ensure you have the correct default printer in Windows Devices and Printers

For more assistance with selecting or modifying a Windows Default Printer, contact your local IT or Windows resources for your version of Windows.

Reinstall the Sage 50 E-mail Writer on affected workstations

See How do I remove and reinstall the Sage 50 E-mail Writer?

Verify that you aren’t using an ARM or Snapdragon processor

1. Press the Windows key+R to open a run line.
2. In the Run line, type in MSINFO32 and press Enter.
3. Verify that you aren’t using an ARM or Snapdragon processor. If you’re using one of these processors, the Amyuni driver won't install.

As a workaround, follow How do I print in PDF format. 

Error: "One or more objects are outside of the printable area” when trying to print forms