There is no data on the hierarchical view here: https://wmcs-edits.wmflabs.org/#wmcs-edits
Looking at the data in wikis_by_wmcs_edits.tsv here: https://analytics.wikimedia.org/published/datasets/periodic/reports/metrics/wmcs/, it seems like the file did get an update this month, but there isn't any data in it for May.
Copied the description from T252915. Looks like a very similar problem.