db.c.drop()
db.c.insert({a: []})
db.c.createIndex({a: 1})
db.runCommand({analyze: 'c', key: 'a'})
db.adminCommand({setParameter: 1, planRankerMode: "histogramCE"})
db.c.find({a: {$gt: 1}}).toArray()

Error: error: {
     "ok" : 0,
     "errmsg" : "Array histograms should contain at least one array",
     "code" : 9160701,
     "codeName" : "Location9160701"
}