Unable to create trigger with feed

[Himavanth]

I am using code from the example provided.

const name = '/whisk.system/alarms/alarm'
const trigger = 'alarmTrigger'
ow.feeds.create({name, trigger, params}).then(package => {
  console.log('alarm trigger feed created')
}).catch(err => {
  console.error('failed to create alarm trigger', err)
})

The error i get is "Resource representation is only available with these types: text/html; charset=UTF-8"