Check the Event Viewer for messages regarding the MassTransit Engine or the MySQL tables. This generally will require a database repair.
To do a database repair you should first backup your databases –
- if on Windows: MassTransit Database Backup Procedures for Windows
- if on Mac: MassTransit 5.1 and 6.0 Database Backup Procedures for Mac OS X
- and then do a repair: Repairing MySQL Tables.