White page when pointing to xertetools folder

Hello Dear Colleagues, I installed Xampp 8.0.11-0 on my Mac OS 10.13.6: Xampp works regularly. But, when pointing on xertetoolkits folder (localhost/xertetoolkits/setup), a white page is shown. I was not able to find a solution on the web.
Maybe someone had similar problems.
Many thanks for your attenzion.
Regards
gsinatti

In which folder did you unzip the xertetoolkits folder?

I unizipped it in the htdocs folder inside Xampp (which is inside xampfiles). I created a new folder there named xertetoolkits.
Thank you for you attention, Tom