IO Error : The Network Adapter could not establish the connection in SQL Developer

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4291012 Jul 19 2020 — edited Sep 10 2020

I am on SQL Developer ver. 20.2.0.175.1842 and I keep getting this error. I have already searched for solutions.

Tried changing from Basic to TNS mode, nothing shows up in the network alias list.
Tried disabling firewall, no help.
Tried to find those 5 services in the using run --> services.msc , those services do not show up.

Please help me with a solution, I was using jdk 14 but it used to keep saying this version is not supported properly,

so I also installed jdk 11, but to no resort.

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