I was successful at creating a custom link that points to a custom report using this URL /00Og0000000Vuf7?pv0={!Account.Name}

But my requirements changed and a joined reports is now needed to display additional data. 

Both fields are named the same Account.Name, but how do I get the URL to populate both blocks on the report

We are revamping cases to be better streamlined with the work flow of our call center agents.  As a result we created a custom link of of the Task object to show all open and closed cases, tasks, etc... 

The button is a URL link to a report, see below.

Label: View All History
Object Name: Task
Name: View_All_History
Link Encoding: Unicode (UTF-8)
Behavior: Display in existing window without sidebar or header
Display Type: List Button
Button or Link URL: /00Og0000000QXTQ?pv0={!Account.Name}

Why is this only working for Sysadmin profile users and not other users with different profiles?  I do not see any reference to Custom buttons/Links in any setting.

URL: https://xxxx.salesforce.com/00Og0000000QXTQ?pv0=Frank+Scerbo+and+Other+Occupants

Error:

Insufficient Privileges You do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary.