Some rpm files were missing.
Most likely, you want to create these signed copies.

Missing files:
/mnt/koji/packages/smeserver-mysql/11.0.0/11.el8.sme/data/signed/44922a28/src/smeserver-mysql-11.0.0-11.el8.sme.src.rpm
/mnt/koji/packages/smeserver-update/11.0.0/21.el8.sme/data/signed/44922a28/src/smeserver-update-11.0.0-21.el8.sme.src.rpm