Nameservers are set, but domain won't claim?

Okay, so I recently got the domain ‘napkins.ml’, and I want to host it using InfinityFree.
I set my nameservers to the byet.org servers, but InfinityFree is saying that I haven’t set the nameservers.

How long ago did you change them? Nameservers changes can take a few hours to be applied.

I changed them at about 7:00 PM, waited a hour and it still didn’t work.

I tried to check the nameservers of napkins.ml, but it looks like it doesn’t resolve anywhere right now. Please check whether you set the nameservers correctly at Freenom and if you’re sure you set them correctly, please ask them why your domain name does not resolve.