HTTP 404 error when using own data

[mingrui-xu]

hellow, I met HTTP 404 error when replacing the data.csv.gz file in the build/ folder and follow the Run without re-building steps. And the the page could not be loaded.

If I do not relace the file, I will not encounter this problem

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Serving HTTP on 0.0.0.0 port 8080 (http://0.0.0.0:8080/) ...
"GET / HTTP/1.1" 200 -
code 404, message File not found
"GET /MERmaid/static/js/main.92048d1f.js HTTP/1.1" 404 -
code 404, message File not found
"GET /MERmaid/manifest.json HTTP/1.1" 404 -