cannot add a column as filter criteria

To filter columns in Clay: 1. Click Filter above the table 2. Select a column to filter 3. Choose your filter criteria (equal to, contains, is empty, etc.) and enter a value If you're getting an error when adding a source to an existing table, you must have the appropriate columns set up first. For example, to add a "Find company" source, you need LinkedIn URLs or Company Domains columns If you're still having trouble, could you describe the specific error message you're seeing?

Sources: Hide, Re-order, Sort, Filter, Merge Columns Sources | Documentation | Clay University Sources | Documentation | Clay University