If you are logging onto Dimensions via a Remote Desktop, sometimes this issue may occur depending what server the Remote Desktop is connecting to. You can get your IT to move you over to a different server that's not causing the issue. Should this not fix the issue then the below steps would be required to be followed:
Please try to uninstall, and reinstall your Accounts system as administrator.
Also please follow the steps of ensuring your Access printer drivers are installed and registered:
Type Devices and Printers into the start menu.
Select Devices and Printers, the window will now open.
Right-click on the PDF Printer/Document Converter which is required to register.
Select Printing Preferences.
Click on the ellipsis button to the right of the window.
Enter 'Access Accounting Ltd.' Into the field titled Licenced to. (Include the full stop at the end)
Enter the string below into the box, Activation Code: 07EFCDAB0100010003C55B7967E6C88AEC8F96868B3A0F4C9ED5301BDB50C4E9CB33FFB29B2D8256FECC558E640A5DEB681FC181799542EC4D975920135B24
Click Ok on the License window.
Click Ok again.