Quota Error

Error #4000: exception 'OMVException' with message 'Failed to execute command 'export LANG=C; omv-mkconf quota 2>&1': quotaoff: Cannot find mountpoint for device /dev/sda4 quotaoff: No correct mountpoint specified.' in /usr/share/openmediavault/engined/module/quota.inc:42 Stack trace: #0 /usr/share/openmediavault/engined/rpc/config.inc(180): OMVModuleQuota->applyConfig() #1 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array) #2 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) #3 /usr/share/php/openmediavault/rpcservice.inc(158): OMVRpcServiceAbstract->callMethod('applyChanges', Array, Array) #4 /usr/share/openmediavault/engined/rpc/config.inc(224): OMVRpcServiceAbstract->callMethodBg('applyChanges', Array, Array) #5 [internal function]: OMVRpcServiceConfig->applyChangesBg(Array, Array) #6 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) #7 /usr/share/php/openmediavault/rpc.inc(79): OMVRpcServiceAbstract->callMethod('applyChangesBg', Array, Array) #8 /usr/sbin/omv-engined(500): OMVRpc::exec('Config', 'applyChangesBg', Array, Array, 1) #9 {main}