Hello
Yes, I wanted to install the full demo site.
After the installation presented several errors.
The installation did not create the folder / cache / com_templates so I created it through ftp.
The Yoga site uses version 3.9.11.
I have updated joomla with the manual method to 3.9.24, some problems disappeared but I still cannot update Helix 3 or upload a templates or add-on.
Also change the permissions to 644 for files and 755 for folders. It was also not corrected.
You should warn that the quick install from that site does not work properly.