Sql Cannot establish new connection

I have Sql Server 2016 running on windows server 2016 (Microsoft SQL Server 2016 (SP1-CU3) (KB4019916) - 13.0.4435.0 (X64)  Enterprise Edition (64-bit) on Windows Server 2016 Datacenter 6.3 <X64> (Build 14393: ) (Hypervisor)
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Server is