SSRS scheduling error creating a report schedule (timeout or low disk)

Scheduling reporting in SQL SSRS (Sql Server Reporting Services) error

After upgrading from SQL server attempting to schedule a report created the error

An error occurred within the report server database. This may be due to a connection failure, timeout or low disk condition within the database.

The error was due to the RSExecRole - that SSRS service uses to access the database, did not have all the permissions it needed.

The post here [https://sqlserverwarrior.wordpress.com/tag/reporting-service-error-connection-failure-timeout-low-disk/](SQL SERVER WARRIOR) gave the solution:

USE Master
GO
GRANT EXECUTE ON master.dbo.xp_sqlagent_notify TO RSExecRole
GO
GRANT EXECUTE ON master.dbo.xp_sqlagent_enum_jobs TO RSExecRole
GO
GRANT EXECUTE ON master.dbo.xp_sqlagent_is_starting TO RSExecRole
GO
USE msdb
GO
GRANT EXECUTE ON msdb.dbo.sp_help_category TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_add_category TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_add_job TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_add_jobserver TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_add_jobstep TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_add_jobschedule TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_help_job TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_delete_job TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_help_jobschedule TO RSExecRole
GO
GRANT EXECUTE ON msdb.dbo.sp_verify_job_identifiers TO RSExecRole
GO
GRANT SELECT ON msdb.dbo.sysjobs TO RSExecRole
GO
GRANT SELECT ON msdb.dbo.syscategories TO RSExecRole
GO