Site doesn't respond

Try logging into your admin page and then on the left-hand side of the page click media->add new. Upload all of the images you would like to use for the slider. Then go back to main admin page and click Appearance->Customize and on the left side of the page should be a section for ‘Image Slider Photos and Settings’ click this and then click ‘Change Image’ and choose one of the images you just uploaded. Do this for all of the sliders you would like and it should work.