ｗｅｂｏｔｓ获取不到图片
在ｗｉｚａｒｄ中创建ｗｏｒｌｄ然后选上 ｒｅｃｔａｎｇｌｅ ａｒｅｎａ 但是都是黑白的
报错如下： WARNING: RectangleArena (PROTO) > BrushedAluminium (PROTO) > ImageTexture: Cannot download
https://raw.githubusercontent.com/cyberbotics/webots/R2021b/projects/appearances/protos/textures/brushed_aluminium/brushed_aluminium_normal.jpg
请问有人遇到过嘛？该怎么解决
