Hi
This error happens when you have a diffusion definition that is calling to non-exists thesaurus. In numisdata ontology old «peri1» (un-oficial tld created by numisdata projects that is not following Dédalo standards) was changed to dc1 (oficial tld for crhonological thesaurus) and if you don't have the dc1 thesauri, the diffusion will fail.
Therefore, you need to change the hierarchy definition for «peri» tld to «dc» tld:

And you will need to process your data in the maintenance panel, to preserve your previous data set, it will change all data in all sections and also Time Machine data.

This procedure will be incorporated in the 6.5.2 update automatically... but for now you can apply manually.
I hope it will clear.
Best