20i REST API is not reachable

I am experiencing a persistent issue when attempting to connect my WordPress website, hosted on a Cloudflare + 20i infrastructure, to the Activepieces API. The error message that consistently appears is “Connection failed: REST API is not reachable”.

I have already conducted numerous tests and adjustments, but nothing seems to resolve the problem. Interestingly, a friend who utilizes the open-source version of Activepieces hosted on a VPS was able to configure the connection without any issues.

Therefore, my question is: could there be a problem related to caching or something similar within the cloud.activepieces.com infrastructure that is preventing the connection? Would it be possible for you to investigate and, if necessary, clear the cache or take any action to resolve this matter?

Thank you very much for your attention to this issue. I eagerly await your response.