Hi Crystal,
To check the sufficient rights, pick one report which is giving above error for one user in PROD.
- Go to universe and provide explicit rights (View on demand or higher) to user.
- Go to universe connection and provide explicit rights (view on demand or higher) to user.
- Now try to refresh the report,
- In case you face same error then try to create a new report from same universe.
If you succeed in above exercise that means, security rights were not copied correctly to PROD environment.
While executing import wizard, are you following steps which were given in reference material provided in my previous post?