Changes

{{#vardefine: event_offerURL | http://example.com/test-event }}

{{#vardefine: event_image | http://example.com/logo.png }}

<!--Declare template names here-->

{{#vardefine:testname|{{#var: event_performer | error}}}}

<br/><br/><br/><br/><br/><br/><br/><br/>

{{Infobox

}

</script>

</code>