'THREE.js MIME Javascript module

I am getting this error when trying to load my three.js page live. In my html I have specified module as my type:

<script type="module" src="./sketch.js"></script>

ERROR:

Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/html". Strict MIME type checking is enforced for module scripts per HTML spec.

This is my folder structure. I have the three.js package folder called "three.js-master" enter image description here

Thank you for your help.

I am also getting this error now:

Uncaught TypeError: Failed to resolve module specifier "three". Relative references must start with either "/", "./", or "../".



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