I built an API on GCP. The health endpoint is working properly:

curl -H "Authorization: bearer $(gcloud auth print-identity-token)" \
https://my-api-123.us-central1.run.app/health
{"status":"healthy"}

The following calls are returning the error:

{"error":"control characters forbidden: invalid-encoding","success":false}

curl -X POST "https://my-api-123.us-central1.run.app" \
  -H "Authorization: bearer $(gcloud auth print-identity-token)" \
  -H "Content-Type: application/json"

Application logs include the "[Start] Starting job scraping process" message, but then an unknown issue occurs is in the scrape_all_countries() function:

def scrape_all_countries():
    """Main function to scrape all countries and all search terms"""
    try:
        logger.info("[START] Starting job scraping process")
        
        conn = get_db_connection()
        grand_total = 0

        try:
            for country in COUNTRIES:
                # Scrape all term categories for this country
                country_total = 0
                country_total += scrape_country(country, GENERAL_TERMS, conn)
                country_total += scrape_country(country, DATABASE_TERMS, conn)
                country_total += scrape_country(country, ADOBE_TERMS, conn)
                
                grand_total += country_total
                logger.info(f"[SUCCESS] Country '{country}' complete: {country_total} total jobs")
                
                # Longer delay between countries
                time.sleep(5)

            logger.info(f"[COMPLETE] SCRAPING COMPLETE! Grand total: {grand_total} new jobs across all countries")
            
        except Exception as e:
            # Clean error message
            error_msg = str(e).encode('ascii', 'ignore').decode('ascii')
            logger.error(f"[ERROR] Error during scraping: {error_msg}")
            raise Exception(error_msg)
        finally:
            conn.close()
            logger.info("[CLOSED] Database connection closed")

        return {"success": True, "total_jobs": grand_total}
    
    except Exception as e:
        # Ensure error message has no control characters
        error_msg = str(e).encode('ascii', 'ignore').decode('ascii')
        logger.error(f"[ERROR] Fatal error in scrape_all_countries: {error_msg}")
        return {"success": False, "error": error_msg}