Icinga2 https checks funktionieren nicht mehr

template Host "host-router" {  
  import "generic-host"  
  check_period = "24x7"  

  vars.notification.period = "Openhours"  

  max_check_attempts = 3
  check_interval = 3m
  retry_interval = 1m

  check_command = "http"  
}

template Host "host-router-ssl" {  
  import "host-router"  
  vars.http_ssl = true
  vars.http_port = 443
}

object Host "//url//" {  
  import "host-router-ssl"  
  address = "//url//"  
  vars.http_vhost = "$address$"  
  vars.hosttype = "fritzbox"  
}