[FIX] Cannot deactive a regular user if there's only one admin

user admin check  at setUserActiveStatus

app/lib/server/functions/setUserActiveStatus.js

@@ -43,7 +43,7 @@ export function setUserActiveStatus(userId, active, confirmRelinquish = false) {
 
 	// Users without username can't do anything, so there is no need to check for owned rooms
 	if (user.username != null && !active) {
-		const userAdmin = Users.findOneAdmin(userId.count);
+		const userAdmin = Users.findOneAdmin(userId);
 		const adminsCount = Users.findActiveUsersInRoles(['admin']).count();
 		if (userAdmin && adminsCount === 1) {
 			throw new Meteor.Error('error-action-not-allowed', 'Leaving the app without an active admin is not allowed', {