Hello @SVADO,
IF you are using Debian 10 or an old Ubuntu version, it is a bug that is already fixed for next Hestia version.
If you want to fix it in version 1.8.8:
Create a backup of /usr/local/hestia/bin/v-list-sys-services and once done, edit the file:
In line 90 change this:
pids=$(pidof -d '|' $name)
by this:
pids=$(pidof $name | tr ' ' '|')
In line 92 change this:
pids=$(pidof -d '|' -x $name)
by this:
pids=$(pidof -x $name | tr ' ' '|')
And check again nginx service in Web UI.