End-user with Admin status cannot access contacts in database.

You could try resetting the user's preferences.  Open the User Profile and click Reset User Preferences.

You could try resetting the user's preferences.  Open the User Profile and click Reset User Preferences.

Thanks for the quick reply, I'll give it a shot and report back.

From the "Contacts" module, I click on the names and nothing happens, even after clearing preferences.

Suzana,

Some questions for you:

1. Is this happening only for this one user, or for all users? 
2. If it is only happening for one user, are they able to view the contacts if they use a different browser?
3. Are there any JavaScrpt Console errors?  (If using Chrome, you can right-click on the browser and select "Inspect Element", then click on the Console tab).

Lori