ROS rviz topic报错Character [ ] at element [xx] is not valid in Graph Resource Name [xx ]

在配置rviz，修改topic项时遇到如下错误。 Error subscribing: Character [ ] at element [12] is not valid in Graph Resource Name [/livox/lidar ].Valid characters are a-z, A-Z, 0-9, / and_. 这个错的大致意思就是：元素[x]处的字符[x]在资源名称[/

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