Nice result. Tnx.

I think the problem arises from the fact that the reports are run within the context of a user accessing the page with the report, while the page can only be accessed by a logged in user. The indexing should be fine for report modules that are placed on public pages, so that the report result can be indexed.

The scenario for the search indexing module is thus a bit more complex than just cancelling the Searchable feature, but doing that can be a solution to prevent the errors.

I will put it on the todo list for the module...

Thanks again for putting me in the right direction!