Thanks for reaching out. I checked your error and it seems to be an idtrackerai bug. The path to the identification model file after Protocol 3 contains only the file name, not the parent folder. Unfortunately, we are no longer fixing Protocol 3 bugs since we are working on the new version 6 of idtrackerai which replaces Protocol 3 with a new algorithm. Version 6 of idtrackerai is planned to be released before christmas. In the meantime, you will have to deactivate identity transfer in this video but, after the tracking, you'll still be able to match identities by using
idmatcher.ai.