How To Install iCal for OpenScholar

Working through the below error in the /calendar/upcoming/all/export.ics output on my localhost:

Please install the iCalcreator library to enable iCal output.

The error occurs despite seeming to have the libraries/modules needed:

$ drush pml|grep -i ical
 Date/Time Date iCal (date_ical)                         Module  Enabled 7.x-2.7
 Other     Hierarchical taxonomy (hierarchical_taxonomy) Module  Enabled 7.x-1.x-dev
 Services  xCal and iCal formats (xcal_format)           Module  Enabled 7.x-3.3+42-dev

This page shows the solution: https://www.drupal.org/docs/7/modules/libraries-api/installing-an-external-library-that-is-required-by-a-contributed-module. That is, we need to copy the iCalcreator source directory into the following locations:

• libraries
• sites/all/libraries
• profiles/[yourprofilename]/libraries
• sites/example.com/libraries

Here is a simple validation test for a successful installation of the iCalcreator library:

$ drush php-eval "var_dump(libraries_load('iCalcreator'));";
array(17) {
  ["name"]=>
  string(11) "iCalcreator"
  ["vendor url"]=>
  string(42) "http://kigkonsult.se/iCalcreator/index.php"
  ["download url"]=>
  string(52) "http://kigkonsult.se/downloads/index.php#icalcreator"
  ["version arguments"]=>
  array(3) {
    ["file"]=>
    string(21) "iCalcreator.class.php"
    ["pattern"]=>
    string(61) "/define\( 'ICALCREATOR_VERSION', 'iCalcreator ([\d\.]+)' \);/"
    ["lines"]=>
    int(100)
  }
  ["files"]=>
  array(1) {
    ["php"]=>
    array(1) {
      ["iCalcreator.class.php"]=>
      array(0) {
      }
    }
  }
  ["module"]=>
  string(9) "date_ical"
  ["machine name"]=>
  string(11) "iCalcreator"
  ["path"]=>
  string(0) ""
  ["library path"]=>
  string(31) "sites/all/libraries/iCalcreator"
  ["version callback"]=>
  string(21) "libraries_get_version"
  ["dependencies"]=>
  array(0) {
  }
  ["versions"]=>
  array(0) {
  }
  ["integration files"]=>
  array(0) {
  }
  ["callbacks"]=>
  array(6) {
    ["info"]=>
    array(1) {
      [0]=>
      string(23) "libraries_prepare_files"
    }
    ["pre-detect"]=>
    array(0) {
    }
    ["post-detect"]=>
    array(1) {
      [0]=>
      string(29) "libraries_detect_dependencies"
    }
    ["pre-dependencies-load"]=>
    array(0) {
    }
    ["pre-load"]=>
    array(0) {
    }
    ["post-load"]=>
    array(0) {
    }
  }
  ["installed"]=>
  bool(true)
  ["version"]=>
  string(7) "2.16.12"
  ["loaded"]=>
  int(1)
}