webdriver-manager update throws network error - tunneling socket could not be established events.js:182

i want to update my webdriver-manager behind a corporate proxy and it doesn't work

Method

-> environment variable in cmd set like "set http_proxy=http://myproxy:myport"

-> environment variable in cmd set like "set https_proxy=http://myproxy:myport"

-> then tried "webdriver-manager update" and it occurs

cmd screenshot of webdriver-manager update

-> I also tried "webdriver-manager update --proxy=http://my-proxy:my-port and it says UnhandledPromisRejectionWarning.

cmd screenshot of webdriver-manager update --proxy

via 3r1c