`@Shadow field player was not located in the target class net.minecraft.class_3244. No refMap loaded`

Mod Development
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1

It’s seems that the shadowed field in the mixin class haven’t remapped it’s name when building by mixin, why?
Repo: GitHub - SettingDust/Paraglider: A Minecraft mod. https://www.curseforge.com/minecraft/mc-mods/paragliders

The compiled file is

@Mixin(class_3244.class)
public class MixinServerPlayNetworkHandler {
    @Shadow
    public class_3222 player;

    @ModifyExpressionValue(
            method = "m_rpfiixll",
            at = @At(value = "INVOKE", target = "Lnet/minecraft/server/network/ServerPlayerEntity;hasVehicle()Z")
    )
    public boolean paraglider$avoidFloating(boolean original) {
        return original && ParaglidingAccessor.INSTANCE.getParagliding(player);
    }

    @Inject(
            method = "onUpdateSelectedSlot",
            at = @At(
                    value = "INVOKE_ASSIGN",
                    shift = At.Shift.BEFORE,
                    ordinal = 0,
                    target = "Lnet/minecraft/server/network/ServerPlayerEntity;getInventory()Lnet/minecraft/entity/player/PlayerInventory;"
            )
    )
    public void paraglider$resetParaglider(class_2868 packet, CallbackInfo ci) {
        ParaglidingComponentKt.disableParaglidingAfterSwitchHeld(player, packet);
    }
}