what is here the problem
Fehler #0:OMV\ExecException: Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; systemctl start 'mysql.service' 2>&1' with exit code '1': Job for mysql.service failed because the control process exited with error code.See "systemctl status mysql.service" and "journalctl -xe" for details. in /usr/share/php/openmediavault/system/process.inc:175Stack trace:#0 /usr/share/php/openmediavault/system/systemctl.inc(86): OMV\System\Process->execute(Array, 1)#1 /usr/share/php/openmediavault/system/systemctl.inc(104): OMV\System\SystemCtl->exec('start', NULL, false)#2 /usr/share/openmediavault/engined/module/mysql.inc(107): OMV\System\SystemCtl->enable(true)#3 /usr/share/openmediavault/engined/rpc/config.inc(194): OMV\Engined\Module\MySql->startService()#4 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array)#5 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)#6 /usr/share/php/openmediavault/rpc/serviceabstract.inc(149): OMV\Rpc\ServiceAbstract->callMethod('applyChanges', Array, Array)#7 /usr/share/php/openmediavault/rpc/serviceabstract.inc(565): OMV\Rpc\ServiceAbstract->OMV\Rpc\{closure}('/tmp/bgstatusXj...', '/tmp/bgoutputn0...')#8 /usr/share/php/openmediavault/rpc/serviceabstract.inc(159): OMV\Rpc\ServiceAbstract->execBgProc(Object(Closure))#9 /usr/share/openmediavault/engined/rpc/config.inc(213): OMV\Rpc\ServiceAbstract->callMethodBg('applyChanges', Array, Array)#10 [internal function]: OMVRpcServiceConfig->applyChangesBg(Array, Array)#11 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)#12 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('applyChangesBg', Array, Array)#13 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('Config', 'applyChangesBg', Array, Array, 1)#14 {main}
cheers McVicar