Checking if the site connection is secure

Could you help me with the following message that the site throws when making a request
Checking if the site connection is secure needs to review the security of your connection before proceeding.
Ray ID: 7a0e01c0285b5908
Performance & security by Cloudflare

While visiting a site protected by Cloudflare, this meand your request was challenged by the filter based Firewall rules or security srttings on the site. If you’re the site owner, you can find the requests that were challenged by the Firewall on the Firewall page under the Events menu. If you are not the site owner then you would need to contact them to see why you were challenged.

If you are stuck with a looping challenge and unable to apss it then please try in a private/incognito window with all extensions disabled and make sure you are using an updated standard browser.

We are consuming a blockchain api key and when making the connection is where we present that error, the language is php