Filtering Data based on ReferenceField

Yeah, I got the same error, it seems that the Editor was updated and no longer accept this ASYNC/AWAIT syntax, so here is the old way:

function queryDataRelatedUser(userId) {
 wixData.query("client-records")
 .eq("relatedUser", userId)
 .find()
 .then(results => {
 return results.items
 })
}

Just replace the last function and put this one instead.