Topic on Extension talk:PrivatePageProtection

Open PrivatePageProtection.php

under the function:

  function privateppGetAccessError( $groups, $user ) {

under line 115:

  if ( is_string( $groups ) ) $groups = explode('|', $groups);

add

  if(! is_string( $groups ) && strpos($groups[0], '|') !== false)  $groups = explode('|', $groups[0]);

then the extension works fine.

Awesome, worked. Cheers