Hi @efdsys, if you are following /e/ installation instructions you may need to be careful when choosing fastboot command to flash your recovery. As we are trying to “temporarily boot” a recovery here the fastboot flash recovery command should not imo be used, as this is the command to install, rather than temporary boot. Further explanation here
As for the 47%, that sound like you completed. Don’t know about Windows installs, but on Linux, in terminal, you would only ever get to 47% and that would be it. Here are a couple of pictures completing sideload on an Xperia XA2
