iwd fails to start starting with openSUSE-release 20200923.  My systemd journal
consistantly says:

Sep 27 13:37:02 urchin iwd[8359]: RC4 support not found
Sep 27 13:37:02 urchin iwd[8359]: The following options are missing in the
kernel:
Sep 27 13:37:02 urchin iwd[8359]:         CONFIG_CRYPTO_USER_API_SKCIPHER
Sep 27 13:37:02 urchin iwd[8359]:         CONFIG_CRYPTO_ECB
Sep 27 13:37:02 urchin iwd[8359]:         CONFIG_CRYPTO_ARC4
Sep 27 13:37:02 urchin systemd[1]: iwd.service: Main process exited,
code=exited, status=1/FAILURE
Sep 27 13:37:02 urchin systemd[1]: iwd.service: Failed with result 'exit-code'.
Sep 27 13:37:02 urchin systemd[1]: Failed to start Wireless service.
Sep 27 13:37:02 urchin systemd[1]: iwd.service: Scheduled restart job, restart
counter is at 5.
Sep 27 13:37:02 urchin systemd[1]: Stopped Wireless service.
Sep 27 13:37:02 urchin systemd[1]: iwd.service: Start request repeated too
quickly.
Sep 27 13:37:02 urchin systemd[1]: iwd.service: Failed with result 'exit-code'.
Sep 27 13:37:02 urchin systemd[1]: Failed to start Wireless service.

Perhaps iwd needs to be rebuilt without support for the ciphers not available
in the kernel.