dns propagation problem

Hello,
my domain is (niscoserver.com) and it is not propagated properly as you see :
"
https://intodns.com/niscoserver.com
"
there are many problems like :
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WARNING: One or more of your nameservers did not return any of your NS records.
"
ERROR: One or more of your nameservers did not respond:
The ones that did not respond are:
51.222.10.241
"
ERROR: Looks like you have less than 2 nameservers. According to RFC2182 section 5 you must have at least 3 nameservers, and no more than 7. Having 2 nameservers is also ok by me.
"
You should already know that your NS records at your nameservers are missing, so here it is again:

ns1.niscoserver.com.
ns2.niscoserver.com.
ns3.niscoserver.com.
"
--
i registered the domain on godaddy on 29/7 and made a 3 hostnames as you see here :
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https://prnt.sc/dioFTOx4YrSD
"
and updated the nameservers for the domain :
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https://prnt.sc/jqqHkBFvqir1
"
and appoint this with whm/cpanel as you see here :
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https://prnt.sc/-7iCalB6N1QD
https://prnt.sc/tVh-7TAVrvW-
"
i did not know what is the problem. Please Help me. Thanks.