The system remain in the state of wanting me to apply the configuration - which not work - it does not matter, if I enable the owncloud plugin or not.
Even the removal/purging of the plugin does not change this - every 'apply action' results in:
Error #4000: exception 'OMVException' with message 'Failed to execute command 'export LANG=C; invoke-rc.d 'apache2' graceful 2>&1': Syntax error on line 7 of /etc/apache2/openmediavault-webgui.d/owncloud.conf: Wrapper /var/www/owncloud/php-fcgi cannot be accessed: (2)No such file or directory Action 'configtest' failed. The Apache error log may have more information. failed! invoke-rc.d: initscript apache2, action "graceful" failed.' in /usr/share/php/openmediavault/initscript.inc:169 Stack trace: #0 /usr/share/openmediavault/engined/module/apache.inc(59): OMVSysVInitScript->invoke('graceful') #1 /usr/share/openmediavault/engined/rpc/config.inc(198): OMVModuleApache->startService() #2 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array) #3 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array) #4 /usr/share/openmediavault/engined/rpc/config.inc(247): OMVRpcServiceAbstract->callMethod('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(62): OMVRpcServiceAbstract->callMethod('applyChangesBg', Array, Array) #8 /usr/sbin/omv-engined(495): OMVRpc::exec('Config', 'applyChangesBg', Array, Array, 1)