If Libyang is installed from package, starting sysrepo or installing the yang model triggers an error:

[ERR]: Failed to create a new libyang context.
sysrepoctl error: Failed to connect (Internal error)

This error seems to be related to: https://github.com/CESNET/libyang/blob/master/FAQ.md

To trigger the error you need to install libyang, hicn-plugin-sysrepo and sysrepo from deb packages. The run the command:

sysrepo-plugind -d -v 4
[ERR]: Failed to create a new libyang context.
sysrepo-plugind error: Failed to connect (Internal error)