Short history. After almost a year running a plain NAS OMV6 box almost without problems 
Im trying to build a new box with the shinning new OMV7. This time it will be more than a NAS, I whant to test the Docker thing (not related I think). Affter adding a couple users in GUI Im hitting a wall trying to change permissions to users. Maybe a bug 
dont really know.
The full error message:
Invalid RPC response. Please check the syslog for more information.
OMV\Rpc\Exception: Invalid RPC response. Please check the syslog for more information. in /usr/share/php/openmediavault/rpc/rpc.inc:187
Stack trace:
#0 /usr/share/php/openmediavault/rpc/proxy/json.inc(95): OMV\Rpc\Rpc::call()
#1 /var/www/openmediavault/rpc.php(45): OMV\Rpc\Proxy\Json->handle()
#2 {main}And syslog
omv-engined[6824]: thrown in /usr/share/openmediavault/engined/rpc/sharemgmt.inc on line 795
omv-engined[6824]: #5 {main}
omv-engined[6824]: #4 /usr/sbin/omv-engined(547): OMV\Rpc\Rpc::call()
omv-engined[6824]: #3 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod()
omv-engined[6824]: #2 /usr/share/php/openmediavault/rpc/serviceabstract.inc(122): call_user_func_array()
omv-engined[6824]: #1 [internal function]: Engined\Rpc\ShareMgmt->setPrivilegesByRole()
omv-engined[6824]: #0 /usr/share/openmediavault/engined/rpc/sharemgmt.inc(795): current()
omv-engined[6824]: Stack trace:
omv-engined[6824]: PHP Fatal error: Uncaught TypeError: current(): Argument #1 ($array) must be of type array, null given in /usr/share/openmediavault/engined/rpc/sharemgmt.inc:795OMV (Debian) is my first taste of any Linux OS. If needed I can run any script, this is a new (old 
) installed PC and I can start from scratch any time. My main box is running untouched until I get familiar with this new version and Docker. I had some problems with keyring in Docker but that was already fixed using omv-aptclean repos
Thank for your time and for this awesome piece of app. Unrelated, but it already saved my data from 2 failled (really old) drives using Snapraid.
Note: English is not my native language
