title: Fatal Error when updating submodule using GIT
body: <p>I am trying to update the submodules of this git repositary but I keep getting a fatal errors:</p>
  
  <pre><code>[root@iptlock ProdigyView]# git submodule update --recursive
  Cloning into core...
  Permission denied (publickey).
  fatal: The remote end hung up unexpectedly
  Clone of 'git@github.com:ProdigyView/ProdigyView-Core.git' into submodule path 'core' failed
  </code></pre>
  
  <p>Or this way</p>
  
  <pre><code>[root@iptlock root]# git clone --recursive https://github.com/ProdigyView/ProdigyView.git
  Cloning into ProdigyView...
  remote: Counting objects: 438, done.
  remote: Compressing objects: 100% (275/275), done.
  remote: Total 438 (delta 172), reused 394 (delta 128)
  Receiving objects: 100% (438/438), 8.03 MiB | 5.19 MiB/s, done.
  Resolving deltas: 100% (172/172), done.
  Submodule 'core' (git@github.com:ProdigyView/ProdigyView-Core.git) registered for path 'core'
  Cloning into core...
  Permission denied (publickey).
  fatal: The remote end hung up unexpectedly
  Clone of 'git@github.com:ProdigyView/ProdigyView-Core.git' into submodule path 'core' failed
  </code></pre>
  
  <p>Any ideas of why this is happening withthe submodule? The repo is this one: </p>
  
  <p><a href="https://github.com/ProdigyView/ProdigyView" rel="noreferrer">https://github.com/ProdigyView/ProdigyView</a></p>
  
  <p>(The submodule is able to be cloned if I do not try to clone it as a submodule.)</p>