[Wikibase-cloud] Query service and popups problem

I suppose the two things may be related. 1. Popups in statements are not displaying (with message "There was an issue dispalying this preview") 2. I cannot get any results from Query Service, even for simple queries. ad.1) There are only a few items in the database: https://indxr.wikibase.cloud/wiki/Item:Q2 https://indxr.wikibase.cloud/wiki/Item:Q3 https://indxr.wikibase.cloud/wiki/Item:Q4 There are no popups in any of them. Browsers javascript console says: "warnings": { "extracts": { "warnings": "Item:Q5 has content model wikibase-item, which is not supported; returning an empty extract." } }, ad.2) Even simple query: https://indxr.wikibase.cloud/query/#SELECT%20DISTINCT%20%3Fitem%20%3FitemLa… or https://indxr.wikibase.cloud/query/#SELECT%20%3Fitem%20%3FitemLabel%20WHERE… returns "no matching record founds". How can I diagnose further what could be the problem? Could it be a problem with the updater? How can I check it? Grzegorz