Impossible modify options from GUI

When I try to change a configuration option from the GUI pressing the last "apply" button, then "An error has occurred" popup and an email containing "monit alert - Does not exist Service nginx" message is sent. Then, after few seconds, another email is sent with the "monit alert - Exists nginx" message. The GUI remains accessible, but it is almost impossible to use.

I've tried to use omv-firstaid with the 2nd options, but the error persists. Before that I've had some errors with collectd service that I've fixed with the same omv-firstaid command with "Fix RRD database" option.

Anything I can try?

OMV 2.2.4.

This did the trick:

omv-mkconf nginx
omv-mkconf php5fpm
service php5-fpm restart
service nginx restart