I find an fix:
https://forums.sketchup.com/t/shape-bender-and-su2019/89078/2
"If the file …/Plugins/clf_shape_bender/clf_shape_bender_data.rb is edited with a plain text editor there are four lines to tweak…
Lines# 290, 291 and 302, 303
At the end of those lines add .position [so that the vertex position [i.e. a point] is used instead of the vertex itself]
So for example:
start_label = Sketchup.active_model.entities.add_text “Start”, @line_endverts[0]
becomes
start_label = Sketchup.active_model.entities.add_text “Start”, @line_endverts[0].position"
I tried and it worked perfectly.