How to fix this issue with unity package manager 127.0.0.1

whenever i open a unity project through unity hub. I get this error about unity package manager i recently updated to unity 2019.2.0f1.(How to fix this issue with unity package manager: could not establish connection with the unity package manager local server process the is most likely due to a proxy or a firewall configuration fix. make sure program %path% is reachable via HTTP on the IP Adress 127.0.0.1 ) i have already add the setx UNITY_NOPROXY localhost 127.0.0.1 through windows cmd Thanks for further solutions.