Broken Slider BG image

the slider background image appears broken to end users after connecting the website to cloudflare. please can somone help me?

the site has been Purge Cache serval times and roacket loader disabled.

the link to the site is

Rocket loader and minifications can sometimes break some styling. Try turning them off in turn and see if that fixes your issues. Settings are in your dashboard here…

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Hello sir/madam,
Thanks for your responds, after doing all this, the site still displays the same error