[Hector Mapping] Could not transform while tf being published

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Hello, I am trying to set a basic launch file to create a map with 2DLidar data using hector mapping (works fine with gmapping).

So I broadcast a static transforms between base_link and laser as required. But when I launch the file, I still have an error:

I don't understand why I get the message Could not lookuptransform base_stabilized to laser timed out, while having the transformation active as shown on the rqt_tf_tree

(also I am playing a rosbag including /scan in 'laser' frame and /clock)

matt