Install that deb from my Dropbox then install python and continue the guide. Sometimes these atv’s can be weird but with the instructions you should be able to figure it out. Welcome to unix
Also, I SFTP your files onto the ATV2. Does it make any difference where on the ATV2 I installed them? I reinstalled all of your files after I was having issues.
Your atv is now portable also. Bring it anywhere and you can view all your home and shared plex content. Pm me if you want to trade myplex libraries. Just sign into http://Plex.tv then goto severs and edit sharing and add me if you wish and I will do the same.