Ionic + Uploadcare error - Property 'json' does not exist on type 'Object'

Ionic Framework Ionic Angular
#1

Hi, so I’m trying to upload an image to UploadCare, but the event.json() comes with an error saying

Property ‘json’ does not exist on type ‘Object’

here’s my code:

uploadPic(event){
    const files = event.target.files

    const data =  new FormData()
    data.append('file', files[0])
    data.append('UPLOADCARE_STORE', '1')
    data.append('UPLOADCARE_PUB_KEY', 'myapikey')
    this.http.post('https://upload.uploadcare.com/base/', data).subscribe(event=>{
    console.log(event)
    const uuid = event.json().File
    this.mainuser.update({
      profilePic: uuid
    })
    })
  }