Hi Adarsh,Check the SAPinst which you are using as sometimes these error comes due to old/new SAPinst tools.Try from different/old version's sapinst.As, i also faced the same issue earlier and it is overcome and continued with next phase after using ...
Proxy is based on the customer settings configuration.For now, you can keep it blank and create programor you can check the settings for the proxies This should be resolved.Thanks,Niranjan