Hi @espsc_tecnologia Thanks for your post, my apologies for the delayed response, it’s been a busy start of the school year.
I’ve tried to reproduce this issue on the servers I run but I haven’t been able to. However, looking at the code, it appears to be an unintended conflict between the Resource Tags widget in the core and the student ATL module as a custom extension to Gibbon. It appears the Planner > View Resources permission may have been activated for your Student role. If you were to disable this permission via User Admin > Mange Permissions (just for your Student role), then I suspect the error message will stop. We can contact the maintainer of the ATL module and let them know about this conflict, so it can be resolved for future versions.