We have used Adobe 5.6 and used Mutlifield composite filed in the component and works without any issues.
After migrating from AEM 5.6 to 6.1 Getting the error in the jsp
An error occurred at line: 27 in the jsp file: /apps/test/components/content/carouselbanner/carouselbanner.jsp
MTMultiCompositeFieldHelper cannot be resolved to a type
<%MTMultiCompositeFieldHelper mht = new MTMultiCompositeFieldHelper();
Retrieving data ...