Hi Janice1314,
Generally, this issue occurs when the connection between AccountRight and Excel has been damaged or lost. This can typically be resolved by reinstalling AccountRight. Additionally, when you are installing AccountRight, it is recommended to right-click on the installer and choose "Run as administrator" to ensure proper installation.
If the issue persists, If the issue persists, you can contact our support team for more help. The best ways to contact our support team are through live chat (MOCA) or by raising a support ticket through myaccount.myob.com.
I hope this helps!
Regards.
Earl