To add donors to a Campaign from an Opportunities report, the report must include Contact records. The correct approach is to create a report type that includes Contacts, such as the Opportunities with Contact Roles report type.

Creating the Report:

Navigate to the Reports tab and click "New Report."

Select the "Opportunities with Contact Roles" report type. This report type includes both Opportunity and Contact records.

Configuring the Report:

Add the necessary filters to include the desired Opportunities and their related Contacts.

Customize the report to display relevant fields, such as Contact Name and Opportunity Amount.

Adding to Campaign:

Once the report is configured and run, select the Contacts you want to add to the Campaign.

Use the "Add to Campaign" button available in the report to add these Contacts as Campaign Members.

Benefits of This Approach:

Ensures that the Campaign Members are correctly linked to the Opportunity records.

Streamlines the process of managing Campaigns and associated donor information.

Additional Steps:

Ensure that the "Add to Campaign" button is enabled for the report type in Setup if it is not already visible.