Unexpected Error

The system encountered an error while processing the following request:
/default/search/detailnonmodal.detail.ordersclick/ent:$002f$002fSD_ILS$002f295$002fSD_ILS:295353/ILS

Error Summary

A component event handler method returned the value Block[Body of search/DetailNonModal:detail.showorderszone, at classpath:com/sirsidynix/discovery/client/components/search/Detail.tml, line 103]. Return type org.apache.tapestry5.internal.structure.BlockImpl can not be handled.
Sun Dec 08 14:06:45 EST 2019