Section background image not being displayed / turns grey?

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Hello All

I have an issue with WordPress, where I set a background image to a section, which appears to work fine but then after a short period turns grey / image not displayed.

If I log into the admin console and edit the page with Elementor pro, the image is showing as it should be but when viewing the webpage the background is grey / image not displayed.

The website is [http://www.itconsultantshub.com/])

I am using an Astra theme.

Anyone else experienced this? Any suggestions would be appreciated

Thanks

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