I’ve been trying to authenticate with Let’s Encrypt through Cloudflare DNS, and you can see the TXT entry listed in the Cloudflare DNS while the challenge is working. But the process is canceled after two minutes.
I’ve restarted things and tried changing the TTL in Cloudflare, but the same thing happens every time.
I’ve did some searching, and this seems to be the exact issue I’m having (until they start discussing DNS servers), we both got the same error message - Time limit exceeded. Last error: NS laura.ns.cloudflare.com. did not return the expected TXT record, but different name servers.