Can't uninstall OMV-Extras

Error #0:
OMV\ExecException: Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; export DEBIAN_FRONTEND=noninteractive; apt-get --yes --auto-remove --purge remove openmediavault-omvextrasorg 2>&1' with exit code '100': Reading package lists...


Building dependency tree...


Reading state information...


E: Could not get lock /var/cache/apt/archives/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/cache/apt/archives/ in /usr/share/openmediavault/engined/rpc/pluginmgmt.inc:151
Stack trace:
#0 /usr/share/php/openmediavault/rpc/serviceabstract.inc(536): OMVRpcServicePluginMgmt->{closure}('/tmp/bgstatuslk...', '/tmp/bgoutput4J...')
#1 /usr/share/openmediavault/engined/rpc/pluginmgmt.inc(155): OMV\Rpc\ServiceAbstract->execBgProc(Object(Closure))
#2 [internal function]: OMVRpcServicePluginMgmt->remove(Array, Array)
#3 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)
#4 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('remove', Array, Array)
#5 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('Plugin', 'remove', Array, Array, 1)
#6 {main}

Error #0:
OMV\ExecException: Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; omv-mkconf apt 2>&1' with exit code '1': Traceback (most recent call last):
  File "/usr/sbin/omv-mkconf", line 23, in <module>
    import argparse
  File "/usr/lib/python3.5/argparse.py", line 87, in <module>
    import copy as _copy
  File "/usr/lib/python3.5/copy.py", line 51, in <module>
    import types
  File "/usr/lib/python3.5/types.py", line 166, in <module>
    import functools as _functools
  File "/usr/lib/python3.5/functools.py", line 23, in <module>
    from weakref import WeakKeyDictionary
  File "/usr/lib/python3.5/weakref.py", line 109
    def remove(wr, selfref=ref(self)):
                                     ^
TabError: inconsistent use of tabs and spaces in indentation in /usr/share/php/openmediavault/system/process.inc:175
Stack trace:
#0 /usr/share/openmediavault/engined/module/apt.inc(37): OMV\System\Process->execute()
#1 /usr/share/openmediavault/engined/rpc/config.inc(168): OMVModuleApt->applyConfig()
#2 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array)
#3 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)
#4 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('applyChanges', Array, Array)
#5 /usr/share/openmediavault/engined/rpc/omvextrasorg.inc(106): OMV\Rpc\Rpc::call('Config', 'applyChanges', Array, Array)
#6 [internal function]: OMVRpcServiceOmvExtras->setRepo(Array, Array)
#7 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)
#8 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('setRepo', Array, Array)
#9 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('OmvExtras', 'setRepo', Array, Array, 1)
#10 {main}