Thanks for your answer!
I already fixed it like this for me, but the problem will still occur at everybody’s pc.
I already played around with many ways off setting the proxy, but in this case the proxy is detected correctly, as seen in
prebuild-install http request Proxy setup detected (Host: xxx, Port: xxx, Authentication: No) Tunneling with httpsOverHttp
I removed the proxy host and port, but these are indeed correct, as far as i can tell the prebuild proxy authentication does not work although host and port are correct.
edit: more information on Proxy authentication
407 Proxy Authentication Required
Normally the authentication is done automatically based on windows credentials or?
edit2: Information on DefaultCredentials
I managed to make binarybuilder work by passing default credentials (through powershell based client)
See Cannot add certain packages (proxy error)
There I also got 407 before i added the credentials.