Caused by: java.lang.NullPointerException
        at org.ametys.web.frontoffice.AbstractSearchGenerator.lambda$saxContent$8(AbstractSearchGenerator.java:902)
        at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
        at java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1683)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
        at org.ametys.web.frontoffice.AbstractSearchGenerator.saxContent(AbstractSearchGenerator.java:902)
        at org.ametys.web.frontoffice.AbstractSearchGenerator.saxPageHit(AbstractSearchGenerator.java:610)
        at org.ametys.web.frontoffice.SearchGenerator.saxHits(SearchGenerator.java:294)
        at org.ametys.web.frontoffice.AbstractSearchGenerator.search(AbstractSearchGenerator.java:305)
        at org.ametys.web.frontoffice.AbstractSearchGenerator.search(AbstractSearchGenerator.java:249)
        at org.ametys.web.frontoffice.SearchGenerator.search(SearchGenerator.java:192)
        at org.ametys.web.frontoffice.AbstractSearchGenerator.generate(AbstractSearchGenerator.java:209)