Missing the index.html and built dir is not correct too

[RanmanticOfMonicaKS]

Describe the bug
after i add this plugin to my pervious pro by useing 'vue add prerender-spa-plugin'.
i followed the prompts ervery step. i think the generated configuration is also correct as bellow.
//...vue.config.js

// main.js

But something different from custom pro is that mine is not right in the root dir at my backend pro.
I have to set my publicPath to '/v5/',maybe thi caused the issue. this is my publicPath configuration bellow

publicPath: process.env.NODE_ENV === 'development' ? '/' : '/v5/',

then i got my dist Dir like this:

My login.html is under in the v5 Dir. And I missed my index.html,too.

To Reproduce
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Expected behavior
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Additional context
Package version: X.X.X
Vue version: 2.6.X
Vue CLI version: 4.2.3

[RanmanticOfMonicaKS]

thanks for erveyone coming to disscuss this issue and best wishes