Error Message

I presently use the Garland Theme and ever since I added a Home Page to my site, when ever I post a link to my blog there is an error message that come up which reads …

You clicked a link to http://stressfreewitheftsite.com/personal-developmentlooking-for-new-ways-to-reduce-stress-and-anxiety-exercise.php and it doesn’t exist. An administrator has been emailed about this problem, too. You can click back and try again or search for what you’re looking for:

Can someone please help to correct this situation
http://www.stressfreewitheftsite.com

Thank You