Chrysa,
What I wrote is the solution for NIall's issue. Does this not work for you?
First, users have to be able to see the block. (See this in the documentation: https://docs.moodle.org/310/en/Configurable_reports#Use_the_same_report_in_different_courses).
Secondly, each and every report must have some type of permission set on its own"Permissions" tab which controls who can see that particular report, using one of the types as shown in teh screenshot above.
What I wrote is the solution for NIall's issue. Does this not work for you?
First, users have to be able to see the block. (See this in the documentation: https://docs.moodle.org/310/en/Configurable_reports#Use_the_same_report_in_different_courses).
Secondly, each and every report must have some type of permission set on its own"Permissions" tab which controls who can see that particular report, using one of the types as shown in teh screenshot above.