rewrite rule are missing

Hello Rahul

I installed plugin on multisite and after installation, I got an error “rewrite rule are missing”. All menu links are going to error 404 page. I had made anspress page as home page. http://techntrends.com/ask/. Please check and let me know what more changes I have to do

Regards
Girish

https://ww.wp.xz.cn/plugins/anspress/