Can't open port even there is no other applications are listening on it [Windows]
The reason is that Hyper-V takes over these ports, to prevent it from happening do the following:
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dism.exe /Online /Disable-Feature:Microsoft-Hyper-V(then restart) netsh int ipv4 add excludedportrange protocol=tcp startport=<your port, mycase: 8888> numberofports=1-
dism.exe /Online /Enable-Feature:Microsoft-Hyper-V /All(then restart)
The original solution is here.
If after that you still can't bind to the port do the following:
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netsh http add iplisten 0.0.0.0for IPv4 -
netsh http add iplisten ::for IPv6
More information is here.