Mapping location with GPS data from Automatic

Configuration
1

Not sure what I am doing wrong with this one:

- platform: template
  sensors:
    f150_longitude:
      friendly_name: 'F150 Longitude'
      icon_template: 'mdi:crosshairs-gps'
      entity_id: 'device_tracker.2013_ford_f150'
      value_template: "{{ states.device_tracker['2013_ford_f150'].attributes.longitude }}"

- platform: template
  sensors:
    f150_latitude:
      friendly_name: 'F150 Latitude'
      icon_template: 'mdi:crosshairs-gps'
      entity_id: 'device_tracker.2013_ford_f150'
      value_template: "{{ states.device_tracker['2013_ford_f150'].attributes.latitude }}"

{{ states.sensor.f150_latitude }}
{{ states.sensor.f150_longitude }}

- platform: generic
  still_image_url: https://maps.googleapis.com/maps/api/staticmap?center={{ states.sensor.f150_latitude }},{{'states.sensor.f150_longitude'}}&zoom=13&size=300x300&maptype=roadmap&markers=color:black%7Clabel:B%7C{{'states.sensor.f150_latitude'}},{{'states.sensor.f150_longitude'}}
  limit_refetch_to_url_change: true
  name: F150 GPS

but I get this:

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