Hello,
First of all, thank you for your purchase.
I checked the URLs that you added to the screenshots, and for me, they are working. Please check example: https://pixabay.com/en/photos/?q=releases&orientation=all&category=all
If these are not working on your server, please contact your hosting provider’s support and ask them to allow connection to this host: https://pixabay.com – they might have a firewall rule active that is blocking the connection to this specific site from your website.
Please let me know if your hosting managed to solve this issue.
Regards, Szabi – CodeRevolution.