I have a similar issue:
01.07.2020 15:51:26 [main] INFO [org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex():1231] indexing… /content/documents/truliforhealth/homepage/home-page—block3/home-page—block3[3]/brxm:image (32800)
01.07.2020 15:51:26 [main] INFO [org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex():1231] indexing… /content/documents/truliforhealth/member/overview-moreinfo/overview-moreinfo[2]/brxm:link (32900)
01.07.2020 15:51:26 [main] ERROR [org.hippoecm.repository.query.lucene.ServicingSearchIndex.isHippoDocument():598] Unexpected exception while checking node type
javax.jcr.nodetype.NoSuchNodeTypeException: {http://www.brxm.com/brxm/nt/1.0}AssetList
01.07.2020 15:51:27 [main] INFO [org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex():1231] indexing… /content/documents/truliforhealth/member/resources-pdf/resources-pdf[3]/brxm:Assets (33000)
01.07.2020 15:51:27 [main] ERROR [org.hippoecm.repository.query.lucene.ServicingSearchIndex.isHippoDocument():598] Unexpected exception while checking node type
javax.jcr.nodetype.NoSuchNodeTypeException: {http://www.brxm.com/brxm/nt/1.0}FormPanelWithText
01.07.2020 15:51:27 [main] ERROR [org.hippoecm.repository.query.lucene.ServicingSearchIndex.isHippoDocument():598] Unexpected exception while checking node type
javax.jcr.nodetype.NoSuchNodeTypeException: {http://www.brxm.com/brxm/nt/1.0}LoginFormWithBanner
01.07.2020 15:51:28 [main] INFO [org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex():1231] indexing… /content/documents/truliforhealth/betterforbusiness/betterforbusiness-flipcards/betterforbusiness-flipcards[2]/brxm:item[3] (33300)
01.07.2020 15:51:28 [main] INFO [org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex():1231] indexing… /content/documents/truliforhealth/betterforpeople/betterforpeople-flipcards/betterforpeople-flipcards/brxm:item[4] (33400)
01.07.2020 15:51:28 [main] INFO [org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex():1231] indexing… /content/documents/truliforhealth/lead-forms/email-form/email-form/brxm:labels[3] (33500)
01.07.2020 15:51:28 [main] ERROR [org.hippoecm.repository.query.lucene.ServicingSearchIndex.isHippoDocument():598] Unexpected exception while checking node type
javax.jcr.nodetype.NoSuchNodeTypeException: {http://www.brxm.com/brxm/nt/1.0}AssetList