To successfully run a phone number waterfall, you need to ensure you have the required input data properly configured. Here's what you need to do: 1. Click 'Add enrichment' and search for Phone Number under Waterfalls
2. Configure your Waterfall sequence by checking the data providers and their order
3. Make sure you've entered all the required data inputs - this could include email addresses or social profile URLs
4. Review your configuration settings before running the waterfallIf the waterfall is still failing after checking these steps, you may want to request help from a human agent to investigate the specific error you're encountering.
Source:Building a data waterfall | Documentation | Clay University