The Blog in my wordpress website is not showing new blog posts. Help!!

Hi,

I’ve been runnning my wordpress website since a year now but now there seems to be some error in the website. The word ‘function’ appears on all the webpages and when I try to post up new blog posts on the blog, the following message appears: ‘Sorry your request was not found. Search our site.’

I have been posting blog posts in the past on this site and they showed. What’s wrong with it now??

Hope someone can help!!