Maybe the Plesk module for Cloudflare is not working perfectly and/or not configured properly.
Reminds me to the same issue as cPanel’s one.
May I ask if you are trying to enable Cloudflare for your domain name using Plesk module?
Have you tried to register a Cloudflare account and then manually adding your domain name to your Cloudflare account?
Therefore, changing the domain nameservers in the process (you’ll be given the two Cloudflare nameservers) at your domain registrar?
Otherwise, you might want to contact your hosting provider for more additional information if the Plesk module is working or not. This is something on their side and they are going to have to fix whatever error caused you to not be able to setup a zone.
Therefore, you can always decide to get started with Cloudflare on your own and not using their interface for it:
We have raised same issue 4days ago but unfortunately it was closed and we are not able to reply the ticket. sharing ticket link on following.
Old Ticket Link
We are facing the issue while enabling Cloudflare from plesk panel. getting following error while enabling the Cloudflare:
An unknown CloudFlare error has occurred during zone creation and has been logged. We apologize for the inconvenience and we will fix the problem promptly.
We have contacted Server Support & They server support responded saying the couldflare is rejecting the configurations done through the Plesk panel.
sharing their conversation please check and help us to solve the issue.
Server Support Reply:
The issue seems to be coming from Cloudflare itself or your API key isn't valid anymore.
If the API key is still valid, I'd suggest contacting Cloudflare support to report the issue.
Let us know if you have further inquiries.
May I ask you to share that one ticket number here?
Therfore, kindly, I’d suggest you to write another one a ticket to Cloudflare support due to your account and/or domain issue and share that ticket number too here with us so we could escalate this issue: