As per the subject, when trying to generate a report I get the above error.
Some Googling tells me this apparently indicates not enough permissions but even if I assign superuser, kibana_user and reporting_user and a extra role giving access to all my indices. The built in elastic account gives the same error.
I also don't see Kibana creating the .reporting-* index. The reporting_user index permission is blank as well. Creating a new role with access to everything doesn't work either.
Elasticsearch and Kibana are both running on Elastic Cloud.
Edit: reporting from discovery works, only reporting to pdf from dashboards isn't working.