Simulink package for arduino with matlab R2019b

I can't use Simulink package for arduino with matlab R2019b

I've tried everything, even reinstall package with adm.

The problem is as follows:

Arduino IDE at folder '' is corrupt. Open Add‑On Explorer to reinstall MATLAB Support Package for Arduino Hardware.

Please, help me.

[John Lutz]

Im on the latest update of R2020b and having the same issue. I tried manually setting it using:

arduinoio.IDERoot = 'C:\ProgramData\MATLAB\Supportpackages\R2020b\3P.instrset\arduinoide.instrset\arduino-1.8.10'

but that did not work. Need this to work for a work project.