User Is Directed to the Setup Page instead of the Default Home Page

To resolve this issue, the 'Make Setup My Default Landing Page' setting must be disabled. This can be done by the affected user or by a Salesforce Administrator.

Option A: Affected user can make the changes

1. Lightning Experience: Click the avatar | Settings Salesforce Classic: Your Name | My Settings
2. Select Display & Layout.
3. Click Customize My Pages.
4. Deselect Make Setup My Default Landing Page.
5. Click Save.

Option B: Administrator can make the changes

1. Lightning Experience: Setup | Users | Users Salesforce Classic: Setup | Manage Users | Users
2. Click Edit on the affected user.
3. Deselect Make Setup My Default Landing Page.
4. Click Save.