Apex domains cannot have CNAME records.
Question and response
Question
dig fotbo.host. NS
Answer
fotbo.host. 2 NS gracie.ns.cloudflare.com.
fotbo.host. 2 NS guss.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
guss.ns.cloudflare.com. 3 A 108.162.193.172
guss.ns.cloudflare.com. 3 A 172.64.33.172
guss.ns.cloudflare.com. 3 A 173.245.59.172
gracie.ns.cloudflare.com. 3 A 108.162.194.144
gracie.ns.cloudflare.com. 3 A 162.159.38.144
gracie.ns.cloudflare.com. 3 A 172.64.34.144
guss.ns.cloudflare.com. 3 AAAA 2606:4700:58:0:0:0:adf5:3bac
guss.ns.cloudflare.com. 3 AAAA 2803:f800:50:0:0:0:6ca2:c1ac
guss.ns.cloudflare.com. 3 AAAA 2a06:98c1:50:0:0:0:ac40:21ac
gracie.ns.cloudflare.com. 3 AAAA 2606:4700:50:0:0:0:a29f:2690
gracie.ns.cloudflare.com. 3 AAAA 2803:f800:50:0:0:0:6ca2:c290
gracie.ns.cloudflare.com. 3 AAAA 2a06:98c1:50:0:0:0:ac40:2290
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0