Question

An administrator creates a new custom object called 'Project__c' and a corresponding custom tab. They also build a Lightning app named 'Delivery' and want the Project tab to appear in its navigation bar. After saving the object and tab, users report that the Project tab does not show up in the Delivery app. What is the MOST likely cause?

Accepted Answer

The Project tab has not been added to the Delivery Lightning app's navigation items in App Manager.

Answer

The Project__c object is missing a master-detail relationship, which is required for tabs to display.

Answer

Custom objects cannot have tabs added to Lightning apps and must use the Salesforce Classic UI instead.

Answer

A Lightning record page must be activated for the object before its tab can appear in any app.