Site Can't open internal pages

I’d suggest going to your dashboard. Settings –> Permalinks and then re-saving them.

WPRanger how to re-saving them???

I tend to press the blue button that says Save Changes.

WPRanger I Did but nothing can happen

what happens if you turn off pretty permalinks? Click the top option.

but i want costume permalink for my site.

I was trying to debug your problem, showing that default permalinks work would have provided key information.

In any event, you need to speak to your hosts about your web server, identifying itself as GFE 2.0. You need to have rewrites enabled to have working pretty permalinks.

k, i’ll try it and let you know…