You were probably trying to reach your proxy on ngrok.io, this is not it.
This domain is NOT owned by ngrok.io and not affiliated with them in any way, but it should be. This domain has trafic. Spelling "ck" instead of "k" is a very common mistake in texts that are typed in frequently, so this is a security flaw. This could have been a man in the middle attack or a phishing website. Ngrok.io should consider purchasing this domain from me. I can be reached via email on firstname.lastname@example.org. I will not accept offers for this domain from anyone unless they can prove they are owners of ngrok.io. If you are an ngrok user you should notify ngrok staff about this security flaw.
P.S. I am a frequent user of ngrok.io and I respect the creators of this wonderful service.