Sage 200 Evolution

Hello, All users suddenly began getting this error when generating income statement reports. How can I replace or find the missing class to solve the problem? Sage version in in use is 10.1.1. Appreciate the assistance in advance.

Good Day, When trying to run a Purchase Orders report for 2019-01-01 to 2019-12-31, Evolution stops responding and the report doesn't load. No matter the date range, even for a single day where there is no PO's (like today), it does the same thing…