A strange error when build the project with custom map

I am a new developer. When I try to replace my customized map into the game according to the SimpleAerial project in sample, I create a new CGL asset in my landscape project, and then write the asset directory as a directory with the bing map data, as shown in the figure. However, when I built this project, an error occurred, which made me very confused. Please tell me what caused this, how can I solve it, and correctly display the map in my game. thank you.