The report page displays the validation errors under two tabs named Class View and Error View.
The Class view tab displays the errors grouped by Class name of each object. For example if there are validation errors found in Object types Concept, Encounter, Location etc. in this tab the errors are listed under the corresponding Class name of the Object which contains the error, as shown in the image below.
The error view tab displays the validation errors categorized based on the validation error name. For example if there are DuplicateNameExceptions errors found in both Concepts and Locations those will be listed under DuplicateNameException error name in the error view tab as shown below.