Couldn't connect to minio when proxy configured in linux

I could connect to minio with duplicati-cli normally but couldn’t connect when proxy (http_proxy with IP,PORT, with and without Username,Password) configured in linux machine.

Here is the duplicati command(Version: - 2.0.5.1_beta_2020-01-18)
duplicati-cli test ‘s3://testbucket?s3-server-name=192.168.1.1%3A9000&s3-location-constraint=&s3-storage-class=&auth-username=minio&auth-password=minio&s3-ext-forcepathstyle=true’

Getting following error:
Fatal error => Error making request with Error Code ProxyAuthenticationRequired and Http Status Code ProxyAuthenticationRequired. No further error information was returned by the service.

Options tried:
s3-ext-proxyhost
s3-ext-proxyport
3-ext-proxybypassonlocal

Is there any possibility to connect via proxy? Anything wrong from my end?