When adding the MS SQL Server 2022 repo as a content source to RHEL image builder, it fails with the following errors:

[tbowling@rhel9latest ~]$ journalctl -fu osbuild-composer.service 
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/projects/source/info/*}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel9-demo}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel-9-latest-CIS-L2}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/ACME_RHEL_Immutable}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/grp-test}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel-9-latest-PCI-DSS}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel-91}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel-9-latest-ms-sql-server-2022}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel9-demo}}
{{Jan 11 07:40:18 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:40:18 GET /api/v0/blueprints/info/rhel-91-edge}}
{{Jan 11 07:41:31 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:41:31 POST /api/v0/projects/source/new}}
{{Jan 11 07:41:38 rhel9latest.example.com osbuild-composer[878]: 2024/01/11 07:41:38 GET /api/v0/blueprints/depsolve/rhel-9-latest-ms-sql-server-2022}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: Traceback (most recent call last):}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: File "/usr/libexec/osbuild-composer/dnf-json", line 386, in <module>}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: main()}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: File "/usr/libexec/osbuild-composer/dnf-json", line 378, in main}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: result, err = solve(request, cachedir)}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: File "/usr/libexec/osbuild-composer/dnf-json", line 275, in solve}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: solver = Solver(}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: File "/usr/libexec/osbuild-composer/dnf-json", line 56, in {}init{}}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: self.base.repos.add(self._dnfrepo(repo, self.base.conf))}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: File "/usr/libexec/osbuild-composer/dnf-json", line 75, in _dnfrepo}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: assert False}}
{{Jan 11 07:41:39 rhel9latest.example.com osbuild-composer[14116]: AssertionError}}

Package versions installed:

[root@rhel9latest ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux release 9.3 (Plow)
[root@rhel9latest ~]# rpm -qa |grep -e osbuild -e composer
python3-osbuild-93-1.el9.noarch
osbuild-selinux-93-1.el9.noarch
osbuild-93-1.el9.noarch
osbuild-luks2-93-1.el9.noarch
osbuild-lvm2-93-1.el9.noarch
osbuild-ostree-93-1.el9.noarch
cockpit-composer-47-1.el9.noarch
osbuild-composer-dnf-json-88.2-1.el9_3.x86_64
osbuild-composer-core-88.2-1.el9_3.x86_64
osbuild-composer-worker-88.2-1.el9_3.x86_64
osbuild-composer-88.2-1.el9_3.x86_64

I have followed the following documentation instructions at https://learn.microsoft.com/en-us/sql/linux/sql-server-linux-change-repo?view=sql-server-linux-ver16&pivots=ld2-rhel

Using those instructions as a regular repo on the host to test.

[root@rhel9latest ~]# cat /etc/yum.repos.d/mssql-server.repo
[packages-microsoft-com-mssql-server-2022]
name=packages-microsoft-com-mssql-server-2022
baseurl=https://packages.microsoft.com/rhel/9.0/mssql-server-2022/
enabled=1
gpgcheck=1
gpgkey=https://packages.microsoft.com/keys/microsoft.asc

DNF verifies the repo works and lists the contents:

[root@rhel9latest ~]# dnf repoquery {}queryformat '%{name}%{version}%{release}{-}%{arch} : %{reponame}' --disablerepo=* --enablerepo=packages-microsoft-com-mssql-server-2022
Updating Subscription Management repositories.
packages-microsoft-com-mssql-server-2022                                                                                     5.2 kB/s | 5.3 kB     00:01    
mssql-server-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-extensibility-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-extensibility-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-fts-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-fts-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-ha-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-ha-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-polybase-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-polybase-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-selinux-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-selinux-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-sqliosim-16.0.4095.4-1-x86_64 : packages-microsoft-com-mssql-server-2022
mssql-server-sqliosim-16.0.4100.1-1-x86_64 : packages-microsoft-com-mssql-server-2022

 When adding the repo as a Source to image builder, I am leaving the SSL and GPG key checks disabled for compatibility, and only setting:

name=packages-microsoft-com-mssql-server-2022
URL=https://packages.microsoft.com/rhel/9.0/mssql-server-2022/
type=YUM repo