diff --git a/admin/tool/lp/classes/external/evidence_exporter.php b/admin/tool/lp/classes/external/evidence_exporter.php
index 586ec2158c0..9c85c86e5f8 100644
--- a/admin/tool/lp/classes/external/evidence_exporter.php
+++ b/admin/tool/lp/classes/external/evidence_exporter.php
@@ -34,7 +34,7 @@ use renderer_base;
 class evidence_exporter extends persistent_exporter {
 
     protected static function define_related() {
-        return array('actionuser' => 'stdClass',
+        return array('actionuser' => 'stdClass?',
                      'scale' => 'grade_scale');
     }
 
@@ -44,9 +44,13 @@ class evidence_exporter extends persistent_exporter {
 
     protected function get_other_values(renderer_base $output) {
         $other = array();
-        $exporter = new user_summary_exporter($this->related['actionuser']);
-        $actionuser = $exporter->export($output);
-        $other['actionuser'] = $actionuser;
+
+        if (!empty($this->related['actionuser'])) {
+            $exporter = new user_summary_exporter($this->related['actionuser']);
+            $actionuser = $exporter->export($output);
+            $other['actionuser'] = $actionuser;
+        }
+
         $other['description'] = $this->persistent->get_description();
 
         $other['userdate'] = userdate($this->persistent->get_timecreated());
diff --git a/admin/tool/lp/classes/external/user_competency_summary_exporter.php b/admin/tool/lp/classes/external/user_competency_summary_exporter.php
index 53f21cdeda5..be99ec7f579 100644
--- a/admin/tool/lp/classes/external/user_competency_summary_exporter.php
+++ b/admin/tool/lp/classes/external/user_competency_summary_exporter.php
@@ -141,7 +141,7 @@ class user_competency_summary_exporter extends exporter {
 
             foreach ($this->related['evidence'] as $evidence) {
                 $related = array('scale' => $scale);
-                $related['actionuser'] = $usercache[$evidence->get_actionuserid()];
+                $related['actionuser'] = !empty($evidence->get_actionuserid()) ? $usercache[$evidence->get_actionuserid()] : null;
                 $exporter = new evidence_exporter($evidence, $related);
                 $allevidence[] = $exporter->export($output);
             }