The risk observatory depends on the ipblocks table, which has been moved to the private replica servers. The usage of that table in research-datasets needs to be migrated to the new table mediawiki_private_ipblocks.
From the announcement: The ipblocks table has recently been removed from the wikireplicas in: T390767 Remove the compatibility layer of block schema in wikireplicas. As a result, we have had to change the way that we ingest this table into the data lake during our monthly sqoop. This data is now being ingested from the private mediawiki replica servers.