decrypt pgp msg using keybase cmd (importing private key issue)

I'm having trouble decrypting a PGP message using Keybase command on Windows (`version 1.0.48-20180516084028+b56432f520`), also I do not (and don't intend to) store my private key in the Keybase servers. I've also tried to locally import my private key to my keybase client. I have GnuPG installed `gpg (GnuPG) 2.2.7 / libgcrypt 1.8.2` and my private/public key appears upon `gpg -K` and `gpg -k` command.

When i initially tried to decrypt a PGP test message using the Keybase command:

`keybase pgp decrypt -i pgpmsg.asc`

I received the following message (even though I was already logged into Keybase) :
> ERROR No username known

I tried to decrypt it again after I had prompted '`keybase logout`' and '`keybase login`', then I received the following error message:
> ERROR decrypt error: unable to find a PGP decryption key for this message

I then tried to import the secret key from the local GnuPG keychain using the command:
`keybase pgp select --only-import`

Which returns the following error message:
> ERROR Key has private part stubbed - cannot import to Keybase keychain. Try again with --no-import.

I am able to encrypt and decrypt messages using gpg just fine, I'm only having problems with Keybase handling the pgp decrypt. I hope this is possible without storing my private key on Keybase servers (`keybase pgp import -i privatekey.asc`).

Start by reproducing the reported Windows flow with `keybase pgp decrypt -i pgpmsg.asc` and `keybase pgp select --only-import`, using the stated GnuPG setup. Trace how the client handles a stubbed private key and local decryption; done means local PGP decryption works without storing the private key on Keybase servers.

Written by the indexing model from the issue text.