I have installed this plugin but when I visit a category page I get a 404 error.
For instance if before the plugin my url was domainname.com/category/category_1, now I am trying to access domainname.com/category_1, but I get a 404 error. The old structure also gives a 404 error.
In my permalink custom structure I have /%postname%/ . I also tried with /%category%/%postname%/ but had the same 404 errors.
I've tried disabling all other plugins, and have tried this with multiple themes.
Thanks for any help.