slider does not change, images not properly sized

Since early this year, the slider for the front page of my website does no longer scroll automatically, although the settings of the slider show that it is set to do just that. Additionally, the manual scroll bar disappeared and only displays the first image of slideshow. The images are disproportional and blurry, a problem I never had before a few months ago. I would really appreciate any help since the organization the website is designed for, is meeting fairly soon. It is an advocate theme, the website link is; Thanks.