Is there a reason you are trying to load a TFLite model for this when we have MoveNet natively in TensorFlow.js in our model.json format for browser?
The MoveNet model we support would be this one that you can import in just a few lines of code:

  
      

      github.com
  

  
    

tfjs-models/pose-detection/src/movenet at master · tensorflow/tfjs-models 6

  master/pose-detection/src/movenet

  Pretrained models for TensorFlow.js. Contribute to tensorflow/tfjs-models development by creating an account on GitHub.

  

  
    
    
  

  


Via our general purpose Pose Detection API:

  
      

      github.com
  

  
    

tfjs-models/pose-detection at master · tensorflow/tfjs-models - How to Run It 5

  master/pose-detection

  Pretrained models for TensorFlow.js. Contribute to tensorflow/tfjs-models development by creating an account on GitHub.