  你好,我用Ubuntu20.04配置好之后,在运行第一个demo的时候,在点击2D NAV Goal 后刚开始程序还能正常生成轨迹,然后就开始提示BsplineTraj]: Cannot find A* path. try merging... [BsplineTraj]: Collision segment merge fail due to insufficient collision segments.请问应该怎么解决这种情况?