Unexpected Error

The system encountered an error while processing the following request:
/en_US/SingaporeLiterature/search/detailnonmodal.detail.assetresourceriver:updateresource/1156/8/0

Error Summary

A component event handler method returned the value Block[Body of search/DetailNonModal:detail.assetresourceriver.resourceinformationzone, at classpath:com/sirsidynix/discovery/client/components/search/AssetResourceRiver.tml, line 3]. Return type org.apache.tapestry5.internal.structure.BlockImpl can not be handled.
Tue Nov 20 01:41:54 SGT 2018