Potential NullPointerException when logout without a xredirect

ERROR o.x.c.o.a.i.OIDCUserManager    - Failed to perform OIDC RP-initiated log-out. 
java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "def" is null
	at org.xwiki.contrib.oidc.auth.internal.OIDCClientConfiguration.getProperty(OIDCClientConfiguration.java:564)
	at org.xwiki.contrib.oidc.auth.internal.OIDCClientConfiguration.getLogoutRedirectURL(OIDCClientConfiguration.java:1174)
	at org.xwiki.contrib.oidc.auth.internal.OIDCUserManager.logoutProvider(OIDCUserManager.java:924)
	at org.xwiki.contrib.oidc.auth.internal.OIDCUserManager.logout(OIDCUserManager.java:911)
	at org.xwiki.contrib.oidc.auth.OIDCAuthServiceImpl.checkAuthOIDC(OIDCAuthServiceImpl.java:123)
	at org.xwiki.contrib.oidc.auth.OIDCAuthServiceImpl.checkAuth(OIDCAuthServiceImpl.java:92)
	at org.xwiki.security.authservice.AbstractXWikiAuthServiceWrapper.checkAuth(AbstractXWikiAuthServiceWrapper.java:50)
	at com.xpn.xwiki.XWiki.checkAuth(XWiki.java:4365)
	at org.xwiki.security.authorization.internal.XWikiCachingRightService.authenticateUser(XWikiCachingRightService.java:238)
	at org.xwiki.security.authorization.internal.XWikiCachingRightService.checkAccess(XWikiCachingRightService.java:268)
	at com.xpn.xwiki.XWiki.checkAccess(XWiki.java:4388)
	at com.xpn.xwiki.XWiki.prepareDocuments(XWiki.java:5780)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:548)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	at com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:764)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:354)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1684)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)