the links to the MERGE CUBE website in the last
answer in you page https://www.cospaces.io/edu/merge-cube.html
The link seems to work well for us. Perhaps try again?
I continue to get
The requested URL /cube was not found on this server.
Apache/2.4.29 (Ubuntu) Server at mergevr.com Port 443
This link works well for us. If this issue persists, please report it to MERGE VR directly.