Docker Plugin Uninstall Error OMV

Fehler #4000:
exception 'OMVException' with message 'Failed to execute command 'export LANG=C; apt-get --yes --auto-remove --purge remove openmediavault-docker 2>&1': Reading package lists...

Building dependency tree...

Reading state information...

The following packages will be REMOVED:
  apparmor* lxc-docker* lxc-docker-1.6.1* openmediavault-docker*
0 upgraded, 0 newly installed, 4 to remove and 0 not upgraded.
After this operation, 16.8 MB disk space will be freed.
(Reading database ...
121000 files and directories currently installed.)
Removing openmediavault-docker ...
dockerui
dockerui
Untagged: dockerui/dockerui:latest
Deleted: b30e8a81575a3772ee4c95419062bbf337edfa9b9d1aacfa797a03702a1ea895
Deleted: 7a2f3ba524467f8292d9e763452df044b2af934f5b63e9157a2b7eea035dd612
Deleted: d6652ad5506d0e62028de3955b7bed5f71e0718e89f419d3a9b999f164d43c67
Deleted: 460f0717d4e51b913c96f42fc67c52265cec528e27dfdb34f78098ab268c1550
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
dpkg: error processing openmediavault-docker (--purge):
 subprocess installed post-removal script returned error exit status 100
Removing apparmor ...
Clearing AppArmor profiles cache:
.
All profile caches have been cleared, but no profiles have been unloaded.
Unloading profiles will leave already running processes permanently
unconfined, which can lead to unexpected situations.

To set a process to complain mode, use the command line tool
'aa-complain'. To really tear down all profiles, run the init script
with the 'teardown' option."
Purging configuration files for apparmor ...
Removing lxc-docker ...
Removing lxc-docker-1.6.1 ...
Stopping Docker: docker
.
Purging configuration files for lxc-docker-1.6.1 ...
Processing triggers for openmediavault ...
Restarting engine daemon ...
Errors were encountered while processing:
 openmediavault-docker
Creating index of upgradeable packages ...
Creating index of OpenMediaVault plugins ...
E: Sub-process /usr/bin/dpkg returned an error code (1)' in /usr/share/openmediavault/engined/rpc/pluginmgmt.inc:170
Stack trace:
#0 [internal function]: OMVRpcServicePluginMgmt->remove(Array, Array)
#1 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array)
#2 /usr/share/php/openmediavault/rpc.inc(79): OMVRpcServiceAbstract->callMethod('remove', Array, Array)
#3 /usr/sbin/omv-engined(500): OMVRpc::exec('Plugin', 'remove', Array, Array, 1)
#4 {main}

---

Failed to execute command 'export LANG=C; apt-get --yes --auto-remove --purge remove openmediavault-docker 2>&1': Reading package lists... Building dependency tree... Reading state information... The following packages will be REMOVED: apparmor* lxc-docker* lxc-docker-1.6.1* openmediavault-docker* 0 upgraded, 0 newly installed, 4 to remove and 0 not upgraded. After this operation, 16.8 MB disk space will be freed. (Reading database ... 121000 files and directories currently installed.) Removing openmediavault-docker ... dockerui dockerui Untagged: dockerui/dockerui:latest Deleted: b30e8a81575a3772ee4c95419062bbf337edfa9b9d1aacfa797a03702a1ea895 Deleted: 7a2f3ba524467f8292d9e763452df044b2af934f5b63e9157a2b7eea035dd612 Deleted: d6652ad5506d0e62028de3955b7bed5f71e0718e89f419d3a9b999f164d43c67 Deleted: 460f0717d4e51b913c96f42fc67c52265cec528e27dfdb34f78098ab268c1550 E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? dpkg: error processing openmediavault-docker (--purge): subprocess installed post-removal script returned error exit status 100 Removing apparmor ... Clearing AppArmor profiles cache: . All profile caches have been cleared, but no profiles have been unloaded. Unloading profiles will leave already running processes permanently unconfined, which can lead to unexpected situations. To set a process to complain mode, use the command line tool 'aa-complain'. To really tear down all profiles, run the init script with the 'teardown' option." Purging configuration files for apparmor ... Removing lxc-docker ... Removing lxc-docker-1.6.1 ... Stopping Docker: docker . Purging configuration files for lxc-docker-1.6.1 ... Processing triggers for openmediavault ... Restarting engine daemon ... Errors were encountered while processing: openmediavault-docker Creating index of upgradeable packages ... Creating index of OpenMediaVault plugins ... E: Sub-process /usr/bin/dpkg returned an error code (1)