This is because the OS failed to install the required update Windows8.1-KB2999226-x64.msu.
However, you can install it by extracting that update to a folder (e.g. XXXX), and execute following cmdlet. You can find the Windows8.1-KB2999226-x64.msu at below.
C:\ProgramData\Package...
Step 1:
Install Plex on PI or you can choose Emby
Step 2:
Configure the media server + add media
Step 3:
Install deluge & config web ui access
Step 4:
Schedule torrent download time & download location to media server library path