I also have a slider hanging up. I am using latest version of WordPress and Mantra. I used this theme on my localhost and it worked fine. I used it again with online server and it works fine when I preview from the WordPress dashboard. However, not when I go to the site via a browser.
Site is: gellecreative.com
I have tried the possible solutions I found here and to no avail. I do have presentation page "enabled" and front page displays "your latest posts".
I have optimized my images used in slider for web use and I set the dimensions of the slider different than the default. I must be missing something.
Thank you for any help.