ggplot2多边形->误差:离散值提供给连续标度。

I am trying to draw couple of countries and fill them with color based on certain variable, and I've achieved it for one country, however when I try to multiply counties I keep on getting Error: Discrete value supplied to continuous scale although the code is basically the same, so here is the nonworking code and its datasetI am trying to draw couple of countries and fil