That error would normally indicate that the account you are using to connect to Service Desk belongs to a Role which is subject to a Data Partition that effectively stops an Issue being created.
Look at the Data Partition 'Employee' for some examples. By default in the Employee data partition a 'Create' Data Partition exists against the Issue object, with the constraint 'id=1' - which can never be met - and so prevents anyone connected with the role Employee from creating an Issue.
My guess would be that you are using credentials that are not currently assigned to a Service Desk Access Type, so your connection is operating under the default Access Type, which is usually configured to be 'Employee'. Try configuring your userid in Service Desk Manager with the Access Type 'Administrator' instead, and check that the Administrator access type has the Role 'Administrator' as its default role.
Regards,
James