every keyserver submit/retrieve returns " ERR 167772346 No keyserver available <Dirmngr>" ?

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I'm trying to get gpg2 up & running on linux.

I've installed

	gpg2 --version
		gpg (GnuPG) 2.1.15
		libgcrypt 1.7.3
		Copyright (C) 2016 Free Software Foundation, Inc.
		License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
		This is free software: you are free to change and redistribute it.
		There is NO WARRANTY, to the extent permitted by law.

		Home: /home/test/.gnupg
		Supported algorithms:
		Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
		Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
		        CAMELLIA128, CAMELLIA192, CAMELLIA256
		Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
		Compression: Uncompressed, ZIP, ZLIB, BZIP2

I can generate key pairs and rev certs OK.

But when I try to upload/retrieve from any keyserver, I get "ERR 167772346 No keyserver available <Dirmngr>".

Here's an attempt with keyserver == pool @ hkps://hkps.pool.sks-keyservers.net

	gpg -v --debug-all --recv-keys 0x673A03E4C1DB921F
		gpg: reading options from '/home/test/.gnupg/gpg.conf'
		gpg: enabled debug flags: packet mpi crypto filter iobuf memory cache memstat trust hashing cardio ipc clock lookup extprog
		gpg: DBG: [not enabled in the source] start
		gpg: DBG: chan_3 <- # Home: /home/test/.gnupg
		gpg: DBG: chan_3 <- # Config: /home/test/.gnupg/dirmngr.conf
		gpg: DBG: chan_3 <- OK Dirmngr 2.1.15 at your service
		gpg: DBG: connection to the dirmngr established
		gpg: DBG: chan_3 -> GETINFO version
		gpg: DBG: chan_3 <- D 2.1.15
		gpg: DBG: chan_3 <- OK
		gpg: DBG: chan_3 -> KEYSERVER --clear hkps://hkps.pool.sks-keyservers.net
		gpg: DBG: chan_3 <- OK
		gpg: DBG: chan_3 -> KS_GET -- 0x673A03E4C1DB921F
		gpg: DBG: chan_3 <- ERR 167772346 No keyserver available <Dirmngr>
		gpg: keyserver receive failed: No keyserver available
		gpg: DBG: chan_3 -> BYE
		gpg: DBG: [not enabled in the source] stop
		gpg: random usage: poolsize=600 mixed=0 polls=0/0 added=0/0
		              outmix=0 getlvl1=0/0 getlvl2=0/0
		gpg: secmem usage: 0/65536 bytes in 0 blocks


I've tried a bunch of different keyservers with always the same result.

What am I missing?