Instant Search 2.9.3 is throwing error

Instant Search 2.9.3
Atlassian Confluence 7.19.19

Seems 2.9.3 is broken. It worked ok in version 2.9.0.

Trying to search anything causes: “An unexpected error has occured at the server side. Please contact a Confluence administrator regarding this.“

And atlassian-confluence.log trace stack:

2024-03-22 11:24:44,214 ERROR [http-nio-8090-exec-9 url: /500page.jsp; user: Username] [atlassian.confluence.status.SystemErrorInformationLogger] logException Unhandled exception 5943bd5e-832e-4860-7485-28596be3df61: Servlet execution th
rew an exception
 -- traceId: b5d432c80ed3b5837
javax.servlet.ServletException: Servlet execution threw an exception
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:216)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
        at com.atlassian.confluence.web.filter.DebugFilter.doFilter(DebugFilter.java:63)
..
Caused by: java.lang.NoClassDefFoundError: com/atlassian/confluence/core/persistence/hibernate/HibernateHandle
        at org.precog.instantsearch.SearchResultHack.lambda$1(SearchResultHack.java:44)
        at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
        at org.precog.instantsearch.SearchResultHack.extractPageIds(SearchResultHack.java:38)
        at org.precog.instantsearch.InstantSearchAction.makeFastSummaries(InstantSearchAction.java:177)
        at org.precog.instantsearch.InstantSearchAction.execute(InstantSearchAction.java:483)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168)
        at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
        at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
..

-Patrick

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