error: No mask_token ( ) found on the input

[X1011]

When I try to use the autocomplete with the Hugging Face Hosted inference API, I get:
[400] {"error":"No mask_token ( ) found on the input","warnings":["There was an inference error: No mask_token ( ) found on the input"]}

I have the Inference api URL set to: https://api-inference.huggingface.co/models/mamiksik/CodeBERTa-commit-message-autocomplete
and I have "Fill Token api token" set to my Hugging Face access token.