java.lang.NullPointerException in HippoContentBean.<init>(HippoContentBean.java:57)

Steps to reproduce

1. Build and start the demo project based on the 13.2.0 release
2. Verify the site works
3. Update the parent to release 13.3.0-SNAPSHOT
4. Rebuild and restart the project

Expected: Site still works

Actual: Nullpointer exceptions and FreeMarker tempaltes fail to load

Caused by: java.lang.NullPointerException
at org.hippoecm.hst.content.beans.builder.HippoContentBean.<init>(HippoContentBean.java:57) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]
at org.hippoecm.hst.content.beans.dynamic.DynamicBeanDefinitionService.generateBeanDefinition(DynamicBeanDefinitionService.java:183) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]
at org.hippoecm.hst.content.beans.dynamic.DynamicBeanDefinitionService.createDocumentBeanDef(DynamicBeanDefinitionService.java:127) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]
at org.hippoecm.hst.content.beans.dynamic.DynamicBeanDefinitionService.createDocumentBeanDef(DynamicBeanDefinitionService.java:119) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]
at org.hippoecm.hst.content.beans.manager.DynamicObjectConverterImpl.lambda$new$1(DynamicObjectConverterImpl.java:60) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) ~[?:1.8.0_201]
...
at org.hippoecm.hst.content.beans.manager.DynamicObjectConverterImpl.<init>(DynamicObjectConverterImpl.java:60) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]
at org.hippoecm.hst.content.beans.manager.VersionedObjectConverterProxy.lambda$getOrCreateObjectConverter$0(VersionedObjectConverterProxy.java:73) ~[hst-content-beans-13.3.0-SNAPSHOT.jar:13.3.0-SNAPSHOT]