Plugins wont play well

every time I try to click on the link to install plugins associated with my theme I get the following error: Warning: Modifying this field will cause your permalinks to malfunction. We strongly recommend that you do not change this field.

Please note that this field should match the web address of your blog installation directory. If you chose to make your blog your home page when you installed WordPress, your blog was automatically configured to display at your domain. You should NOT change the value of this field to match your domain. NOW WHAT DID i DO WRONG 🙁