When I try to log in to the MYOB there is a error.
"Serious problem exist in this company"
"you may be able to recover the data contained in this file using tha ACCOUNTING RIGHT premier Optimisation Assistant"
If recovery is unsuccessful you must restore a previous backup of your company accounts right premier data
Please refer to help to learn more about the optimisation assistance

and How to restore from a previous backup.
What is the issue?