[Solved] [Krazilec] Error with apt-get

Creating index of OpenMediaVault plugins ...
{"response":null,"error":{"code":4000,"message":"Failed to execute command 'export LANG=C; apt-get --simulate --reinstall install openmediavault-downloader 2>&1': Reading package lists...\n\nBuilding dependency tree...\n\nReading state information...\n\nSome packages could not be installed. This may mean that you have\nrequested an impossible situation or if you are using the unstable\ndistribution that some required packages have not yet been created\nor been moved out of Incoming.\nThe following information may help to resolve the situation:\n\nThe following packages have unmet dependencies:\n openmediavault-downloader : Depends: libav-tools but it is not going to be installed or\n                                      ffmpeg but it is not going to be installed\nE\n: Unable to correct problems, you have held broken packages.","trace":"exception 'OMVException' with message 'Failed to execute command 'export LANG=C; apt-get --simulate --reinstall install openmediavault-downloader 2>&1': Reading package lists...\n\nBuilding dependency tree...\n\nReading state information...\n\nSome packages could not be installed. This may mean that you have\nrequested an impossible situation or if you are using the unstable\ndistribution that some required packages have not yet been created\nor been moved out of Incoming.\nThe following information may help to resolve the situation:\n\nThe following packages have unmet dependencies:\n openmediavault-downloader : Depends: libav-tools but it is not going to be installed or\n                                      ffmpeg but it is not going to be installed\nE\n: Unable to correct problems, you have held broken packages.' in \/usr\/share\/openmediavault\/engined\/rpc\/pluginmgmt.inc:382\nStack trace:\n#0 [internal function]: OMVRpcServicePluginMgmt->createIndex(Array, Array)\n#1 \/usr\/share\/php\/openmediavault\/rpcservice.inc(125): call_user_func_array(Array, Array)\n#2 \/usr\/share\/php\/openmediavault\/rpc.inc(79): OMVRpcServiceAbstract->callMethod('createIndex', Array, Array)\n#3 \/usr\/sbin\/omv-engined(495): OMVRpc::exec('Plugin', 'createIndex', Array, Array, 1)\n#4 {main}"}}
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