Ok here is a possible solution that worked for me.
In this article How to fix this erorr - #20 by Adam_McBride Adam McBride mentioned that whitelisting IPaddresses from make.com could solve the issue.
There are a lot of IPs here at this list Make.com list of IP addresses
So to narrow down what you need to use make.com IPs related to your account. To find these out login and go to organisation, then variables and at the bottom it will provide you with your zone.
Once you know your zone you can whitelist the three IPs for your make.com zone in your Firewall. This fixed the issue for me as we do use cloudflare.