fail to start Unity Package Manager,

my environment is Unity 2018.2.3f1 + Win10

solution:

1. Set the value of environment variable UNITY_NOPROXY to localhost,127.0.0.1

quickly set CMD command: setx UNITY_NOPROXY localhost,127.0.0.1

2, find C:\Windows\System32\drivers\etc\hosts file, remove the comment symbol before “127.0.0.1 localhost” and save.

3, close the system firewall, close the system firewall, close the system firewall…

4, close antivirus software, eliminate interference…