Cubase ai help

Hi people ! i have a problem .
Buyed the YAMAHA AG-06 mixer and in the box i have the CUBASE AI free download with access code , but i can’t download it , because the link doesn’t exist anymore
what i should do ? please help me
the SUPPORT on STEINBERG doesn’t work too , they sending me to some unusefull links to read some articles


Download Steinberg Download Assistant and then download Cubase by using this software, please.