Paddling8968 A large fraction of installation failures are due to a borderline cable. A borderline cable can work fine for earlier steps of the process and then be insufficient later.
If you are using Brave, were shields disabled as in the instructions? Is Brave up to date? Can you try a different browser?
Which Android device were you using as the installer? Which version of Android is it running? How much free storage space does it have?
Overall, since the issue may be due to a small detail, the best way to get help is to provide lots of details.