Tested on Gpg4win 4.3.1 which includes
GnuPG 2.4.5
Kleopatra 3.2.2
On Windows 10 German
```
gpg --keyserver hkps://keyserver.ubuntu.com --search-keys bernhard@intevation.de
gpg: error searching keyserver: Kein "Inquire" "Callback" für IPC gesetzt
gpg: Suche auf dem Schlüsselserver fehlgeschlagen: Kein "Inquire" "Callback" für IPC gesetzt
```
and this is the default, directly after a fresh install:
```
gpgconf --list-options dirmngr
[..]
keyserver:16:0:Benutze Schlüsselserver unter der URL:1:1::"hkps%3a//keyserver.ubuntu.com::
```
the keyserver search does work, though when leaving out the prefix, e.g.
```
>gpg --keyserver keyserver.ubuntu.com --search-keys bernhard@intevation.de
gpg: data source: http://185.125.188.27:11371
(1) Bernhard Reiter <bernhard@intevation.de>
[..]
```
This affects the Kleopatra search as well and the configuration.
When trying to configure "keyserver.ubuntut.com" or "pubkeys.intevation.de" it will ass the "hkps://" and it does not work anymore.