Backing up MySQL results in empty dump

If I do a full backup of my server or go to
(Virtualmin) -> Edit Databases -> (TestDatabase) MANAGE -> Backup Database -> (DL in browser) BACKUP NOW
This is the backup.sql result I get:

– MySQL dump 10.13 Distrib 5.7.29, for Linux (x86_64)

– Host: localhost Database: TestDatabase


– Server version 5.7.29-0ubuntu0.18.04.1

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT /;
/
!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS /;
/
!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION /;
/
!40101 SET NAMES utf8 /;
/
!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE /;
/
!40103 SET TIME_ZONE=’+00:00’ /;
/
!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 /;
/
!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 /;
/
!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE=‘NO_AUTO_VALUE_ON_ZERO’ /;
/
!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

And that’s all. But my DB contains of 42 tables and hundred of entries. How can I fix this, that the dump contains anything? Funny thing is it worked once…

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