Parsec installs a virtual display adapter to handle headless setups (computers without monitors). Sometimes, after a Windows update or driver conflict, this adapter malfunctions and prevents the video stream from initializing, which can trigger a handshake failure.
Try disabling in the client settings if your hardware only supports H.264. ⚡ Technical Workarounds Use Integrated Graphics parsec error 14004
Ensure the client machine has the latest drivers for its integrated or dedicated GPU. Disable H.265 Parsec installs a virtual display adapter to handle
Try lowering the host resolution to before connecting. parsec error 14004