Monitoring networkconnection with Monit

[Mr. Happy]

For a couple of days I've been trying to get Monit to monitor my openvpn-client and (re)start the client if needed.
According to the monit manual this should work:

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check network vpn_cl_openvpn interface vpn_cl_openvpn
   start program = "/usr/local/sbin/pluginctl -s openvpn start 3"
   stop program = "/usr/local/sbin/pluginctl -s openvpn stop 3"
   if check network vpn_cl_vpn interface ovpnc3 then alert
The logging however says

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/usr/local/etc/monitrc:33: syntax error 'check network'.
Can anybody help me fix this (and get the monitoring working  ;D)?

-- EDIT

Tried the manual approach....

Apparently the gui does not work well...
When I enter this

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check network vpn_cl_openvpn interface vpn_cl_openvpn
   start program = "/usr/local/sbin/pluginctl -s openvpn start 1"
   stop program = "/usr/local/sbin/pluginctl -s openvpn stop 1"
   if link down then restart
in /usr/local/etc/monitrc and test (and run) it it is fine. The gui, however, gives me an error the syntax is wrong, the interface does not exist and the tab 'Status' shows me the link is down.
Also the log spams me with this

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2022-06-12T20:28:31 Informational monit 'vpn_cl_openvpn' start: '/usr/local/sbin/pluginctl -s openvpn start 1'
2022-06-12T20:28:31 Informational monit 'vpn_cl_openvpn' stop: '/usr/local/sbin/pluginctl -s openvpn stop 1'
2022-06-12T20:28:31 Informational monit 'vpn_cl_openvpn' trying to restart
2022-06-12T20:28:30 Error monit 'vpn_cl_openvpn' link data collection failed -- Cannot udate network statistics -- interface vpn_cl_openvpn not found

I have tried changing the interface to ovpnc1 (the name it has according to ifconfig), then the gui does not give me errors but does not (re)start the openvpn-client (although the service is stopped).

-- EDIT 2 --
Tried it with running a script which returns 1 when the interface is down en 0 when it is up.
The value 1 makes the openvpn service start (as described above), but Monit keeps the value 1 and thus restarts the interface every 2 minutes...

I can't believe the integration of Monit in OpnSense is that crippled... What am I missing?

[Mr. Happy]

Changed the script to also echo the value returned with 'ifconfig'.
When I stop the openvpn client it changes the value, but when the client is started the value remains the as if the client is stopped....
(Running the script from commandline works fine, OPNSense seems to have an issue with updating the value...)
Also using another script that does a wordcount on the result of ifconfig only changes on the first status change, after that it keeps that value... Also echoing the result of ifconfig here returns the value of the client being stopped. (Also this script works fine on commandline.)

What is the cause of this behaviour?