After upgrade when launch Mart server Admin getting error Mart DB version is not compatible with Mart Server.

Upgraded from mart 9.7 to mart 9.8 when login to Mart Admin URL, get error:

Mart DB version is not compatible with Mart Server.

Please make sure re-configure mart server by going to erwin Mart Server configure window and reconnect to the database. restart the service,

If it does not resolve

Please follow below steps:

1) stop the mart server service from Control Panel
2) rename martserver and martadmin folder in:\\Tomcat64\Webapps directory
3) remove martserver service
4) recreate martserver service, and restart martserver service
5) relaunch Mart server admin URL

NOTE:  another cause for this error could be the DBMS is down or not responding.  You can activate the application.log file to gather more details and determine the problem cause.  Please also see, https://support.erwin.com/hc/en-us/articles/115000139587-How-to-set-up-the-mart-server-to-generate-log-files-