Issue while upgrading hippo version from 11.2 to 12.00

Hi Team,

I am working on upgrading project from 11.2 to 12.00 version and I am following the steps mentioned on following URL:

Currently I have completed with step “Migrating XML to YAML” files.After that I did build the project succussfully. While running the project I am facing issue as follows.I am getting following error:

“javax.jcr.nodetype.ConstraintViolationException: No child node definition for filteringHtmlCleanerService found in node /hippo:configuration/hippo:frontend/cms/cms-services”

I checked in cms.yaml file but this node “filteringHtmlCleanerService” is already present there.

Could you plaese suggest some solution for that or What exactly the root cause for that?

Thanks in advance.