Miracast is essentially a "wireless HDMI" standard. It uses Wi-Fi Direct to create a direct, peer-to-peer connection between your Windows 11 device and a display (like a Roku, Amazon Fire Stick, Microsoft Wireless Display Adapter, or Smart TV).
For Miracast to function on Windows 11, both the source (PC) and the receiver (TV/monitor) must meet specific standards: your device doesn t support miracast windows 11
Try these in order. Each one solves the error for most people. Miracast is essentially a "wireless HDMI" standard