Failed to load module script:

[FVCSAV]

Failed to load module script: The server responded with a non-JavaScript MIME type of "text/plain". Strict MIME type checking is enforced for module scripts per HTML spec.
After jumping to the pdf.js interface, this error appears, and then you can see the upper button of pdf.js, but there is no pdf content in the middle. I found that the method on the Internet is to configure nginx, but I use uniapp, and I don't want to use nginx to complete it. I used version 3.2, and now I have changed to version 4.9.