Most of the time on many games it's firewall/blocked port or port-forwarding issue, please follow the guide at https://github.com/hrydgard/ppsspp/wiki/...ith-PPSSPP
Also, please use the latest version if you're not already using it. (and for compatibility reason all players should use the same version)
Also, please use the latest version if you're not already using it. (and for compatibility reason all players should use the same version)
PPSSPP Multiplayer Guide: https://github.com/hrydgard/ppsspp/wiki/How-to-play-multiplayer-games-with-PPSSPP