WD30EZRX won't mount.

Erreur #6000: exception 'OMVException' with message 'File contains invalid JSON (filename=/var/lib/openmediavault/fstab_tasks.json): ' in /usr/share/php/openmediavault/util.inc:272 Stack trace: #0 /usr/share/php/openmediavault/module.inc(141): OMVJsonFile->read() #1 /usr/share/openmediavault/engined/module/fstab.inc(52): OMVModuleAbstract->execTasks('delete') #2 /usr/share/openmediavault/engined/rpc/config.inc(164): OMVModuleFsTab->stopService() #3 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array) #4 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) #5 /usr/share/php/openmediavault/rpc.inc(79): OMVRpcServiceAbstract->callMethod('applyChanges', Array, Array) #6 /usr/share/openmediavault/engined/rpc/filesystemmgmt.inc(903): OMVRpc::exec('Config', 'applyChanges', Array, Array) #7 [internal function]: OMVRpcServiceFileSystemMgmt->mount(Array, Array) #8 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) #9 /usr/share/php/openmediavault/rpc.inc(79): OMVRpcServiceAbstract->callMethod('mount', Array, Array) #10 /usr/sbin/omv-engined(501): OMVRpc::exec('FileSystemMgmt', 'mount', Array, Array, 1) #11 {main}