Impossible to select a topic in RVIZ

Hello everyone,

I tried to follow the Unit 1 of ROSNavigationIn5Days but I don’t really know why but I can’t select the topic on RVIZ like this : image .

Actually, that’s what I have : image

I guess I made a mistake, I missunderstood or forget something… Does anyone have an idea of the origin of the problem?

Thank you for your reply.

Try clicking where it should be. A dropdown should appear


I tried it but it didn’t work. So I relaunched rviz a second time and now it’s working! I feel a bit dumb now haha! Anyway thank you for your answer!

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