I meet the error 'Uncaught ReferenceError: d3 is not defined'

Hello, I am using d3.v7.min.js, I have downloaded it from http://d3js.org/d3.v7.min.js and put the file to a http server,
and also I write a html file to use this js file, I tried 2 ways to view the page:
1) view the page locally, there is no error, it works totally as expected;
2) view the page by remote, the browser reports “Uncaught ReferenceError: d3 is not defined”, I confirm via F12 that d3.v7.min.js is downloaded successfully by web browser.
I have tried to use Firefox and Chrome, error exists at both of them.

key codes are as below:
<script src="../../../js/d3.v7.min.js" charset="utf-8"></script>	
<script >

About the cause of error "d3 is not defined", you may share your opinion if you met the similar issue.
Thanks a lot.

Try to see if the path to the file is correct. The ../../../ part might not lead to the same folder on your server as it does locally.

.js file and html file are not in the same directory, if this path is wrong, js file cannot be downloaded OK.