MSPhysics is installed but does not appear on the interface? (Fig 1)

[mihai.s]

"C:/Users/admin/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/libraries/stage/win64/2.5/msp_lib.so", is missing!>

Did you check compatibility? [2019-04-29_my] then [2019-04-29_ms2]

And the answer from the author: MS Physics and SU 2019 • sketchUcation • 1