Picture-elements with state-label display unknown

hi need help here
i did that

Blockquote
- type: picture-elements
image: “local/luup.jpeg”
elements:
- type: state-label
entity: sensor.thermo
style:
top: 82%
left: 80%

Blockquote

i can see the luup.jpeg image but instead of the state-label i have unknown
do you know why ?
thanks

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