A customer of ours with a shared web hosting account recently approached us stating that they could not access their website.
It was presenting a white screen with nothing more than "403 forbidden - openresty".
When we checked the web server error logs, we saw nothing of relevance to the issue.
After a session we set up via Anydesk with the customer, we found that the issue was being caused by Cloudflare Warp, which was running on the customer's PC.
Interestingly, it only impacted websites that were using Cloudflare's nameservers.
After uninstalling Cloudflare Warp, the issue was resolved.
Whilst this may not solve the issue in every instance, it did solve it here - so hopefully this article will help others who may run into this error.
