Unexpected Error

The system encountered an error while processing the following request:
/default/search/detailnonmodal.detail.ordersclick/ent:$002f$002fSD_ILS$002f179$002fSD_ILS:179888/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.
Fri Jan 24 09:57:12 EST 2020