The requested information does not exist - Appointments

Hi,

I am trying to Manage Appointments with the Appointment Scheduling Module, but I get this message:

I tried giving superman all the privileges, but this did not solve my problem.

Has anyone experienced the same thing, and how did you manage to solve this?

Thank you in advance!

assign all appointment relevant privilege to the user. Also open chrome devtools, and check the network tab - identify which API is failing … that might provide more clues.