How to describe this one.
What I get on my own machine after a reasonable length of time is firstly a ERR_CONTENT_LENGTH_MISMATCH 200 (OK) error message :
init.js:40 GET http://js.arcgis.com/3.13/dojo/store/Cache.js net::ERR_CONTENT_LENGTH_MISMATCH 200 (OK)
Next I get :
init.js:41 Error: scriptError
at d (init.js:15)
at HTMLScriptElement.<anonymous> (init.js:40)
Then immediately following is where it hangs: