Since a few days there are constantly errors when trying to fetch packages from
the mentioned site at https://gitlab.freedesktop.org/dbus/dbus/-/jobs/34800161:

Retrieving: mingw64-cross-binutils-utils-2.39-lp154.19.1.x86_64.rpm [..error]
Abort, retry, ignore? [a/r/i/...? shows all options] (a): a
Download (curl) error for
'https://download.opensuse.org/repositories/windows:/mingw:/win64/openSUSE_Leap_15.4/x86_64/mingw64-cross-binutils-utils-2.39-lp154.19.1.x86_64.rpm':
Error code: Curl error 92
Error message: HTTP/2 stream 0 was not closed cleanly: PROTOCOL_ERROR (err 1)
Problem occurred during or after installation or removal of packages:
Installation has been aborted as directed.


Th following commands are executed:

/usr/bin/zypper --non-interactive ar --refresh --no-gpgcheck
https://download.opensuse.org/repositories/windows:/mingw:/win64/openSUSE_Leap_15.4/windows:mingw:win64.repo
...
 /usr/bin/zypper --non-interactive install --allow-vendor-change sudo autoconf
autoconf-archive automake cmake libtool meson docbook_4 docbook-xsl-stylesheets
doxygen libqt5-qttools libxslt-tools yelp-tools which wine xvfb-run
mingw64-cross-gcc-c++ mingw64-cross-pkgconf mingw64-libexpat-devel
mingw64-glib2-devel mingw64-cross-meson
...