Crucial Bug: Country Codes Directory tool completely failing on real-time data lookup queries, urgent fix needed!

Our 'Country Codes Directory' web tool is completely failing right now; all real-time data lookup queries are returning nothing, pointing to a critical API integration issue. I'm getting absolutely no useful error messages to debug, and this is truly critical for our users; I'm at my wit's end trying to figure it out. Waiting for an expert reply.