when posting a blog on the front end, get error message repeatedly.."method defaults does not exists in this context"

please help with this issue. saw others had this issue but you just got their ftp and fixed so I'm posting here instead of trying to fix myself.

Okay... I did find where you state that your software has problems with redirects from /index.php to home page. When this is removed the error message doesn't happen.

Please explain how we have both the ability to redirect /index.php for seo purposes and no error message.