Slider does not load unless hit page 'refresh'

Just created my first slider and loaded onto website. However, slider does not load – just the circles rotating (even after 10+ minutes). However, if I refresh the page, slider loads immediately no problem. Please advise how to fix this?

Location of my slider: http://www.lisa-hatzimihail.com.au
Then click ‘WEDDING’

Thanks.

https://wordpress.org/plugins/master-slider/