Configuration of the register model step

I’m getting a grading error on the register model step in Course 2 Week 3. I’ve tried all the following but nothing worked.
image_uri = inference_image_uri
image_uri = ‘763104351884.dkr.ecr.us-east-1.amazonaws.com/pytorch-inference:1.6.0-cpu-py36
image_uri = “763104351884.dkr.ecr.us-east-1.amazonaws.com/pytorch-inference:1.6.0-cpu-py36
image_uri = ‘s3://763104351884.dkr.ecr.us-east-1.amazonaws.com/pytorch-inference:1.6.0-cpu-py36’

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