plugin trying to load scripts from unsafe sources

Hi,

i’m encountering this issue whenever i try to load a new slide or copy / duplicate an existing one. nothing happens, and chrome gives me the following error message: http://prntscr.com/h0sb9j

If i allow the unsecure script to load, nothing happens, except i get a chrome message telling me the page is no longer secure.

here is the error message i’m seeing in console: Failed to load http://www.domainname.com/wp-admin/admin.php?page=smart-slider-3&nextendcontroller=slides&nextendaction=duplicate&sliderid=1&slideid=1&mode=ajax&nextendajax=1&nextend_nonce=61a995e6ee: Redirect from ‘http://www.domainname.com/wp-admin/admin.php?page=smart-slider-3&nextendcontroller=slides&nextendaction=duplicate&sliderid=1&slideid=1&mode=ajax&nextendajax=1&nextend_nonce=61a995e6ee’ to ‘https://www.domainname.com/wp-admin/admin.php?page=smart-slider-3&nextendcontroller=slides&nextendaction=duplicate&sliderid=1&slideid=1&mode=ajax&nextendajax=1&nextend_nonce=61a995e6ee’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘https://www.domainname.com’ is therefore not allowed access.

(have changed the domain name in above cut and paste)

I’m running my site over cloudflare and the whole site over https. are there any known issues and can anyone help get round this please?

thx in advance