Prohibition Symbol - Red Square with Black X Icon for Error or Denial #100013 (License: Personal Use)

This high-contrast icon features a vivid red rounded square background with a thick black diagonal X crossing the center. The design follows international standards for prohibition and error indication, ensuring immediate recognition across digital interfaces and physical signage. Its simplicity and visual weight make it ideal for alerting users to blocked actions or critical failures.

Commonly used in web forms, software alerts, traffic signs, and safety labels to denote forbidden actions, failed operations, or invalid inputs. Matches user intent seeking visual cues for errors, restrictions, or stop conditions.