This looks to me like you’re running a kernel without SCTP support. SBc-AP is specified over SCTP, as far as I recall, so your Linux kernel must have SCTP support. Note that Linux has had SCTP support for decades, and all major distributions have it enabled (as kernel module).
So whatever you did to disable it must be something you’ve been doing locally on your system. Maybe you have a custom kernel build?
Good catch! Some distros like ArchLinux will clean-up kernel modules for the currently running kernels after a system upgrade, even if the kernel is still loaded.
The system can’t load any new modules then, which would probably cause this behaviour as well.
@julianeble Did you do a system upgrade and then not reboot after that? If so: Do a reboot
Yea you’re right! I’m running a it with the Rocky Linux 8.
I did install all the modules and now it’s trying to estabilish the connection.
But now I’m getting some new error:
I think we’ve reached the point where a bug tracker should be used and not a general discussion forum.
Please kindly file an issue on osmocom.org in the section of the osmo-cbc software including all details such as the exact version of osmo-cbc + libosmocore + libosmo-sigtran you’re using, as well as your configuration file.