When I am on a record page, DC Live only shows the logo, nothing else.
This can have two different causes:
1. Incomplete Object Filter Configuration
It might be caused by an incomplete Object Filter configuration, where Type is set to 'Value (not) Equal', but no Field is selected:
You need to select a Field, and fill in a Value (unless the field value for the field you selected should be empty).
2. Missing Apex Classes
The end user does not have access to all Apex Classes starting with 'dupcheck'. Read here about how to get access to the Apex Classes.