fix

app/Http/Controllers/SurveyQuestionController.php

@@ -77,14 +77,20 @@ public function adminUsers(Request $request)
     // Accepts either local user ID or approagency identifier (UUID).
     public function adminUserShow($identifier)
     {
-        $user = User::where('id', $identifier)
-            ->orWhere('identifier', $identifier)
+        $query = User::query()
             ->select('id', 'first_name', 'last_name', 'age', 'gender', 'birthday', 'email', 'mobile', 'created_at')
             ->withCount(['surveyAnswers as answers_count'])
             ->withCount(['surveyAnswers as questions_answered' => function ($q) {
                 $q->select(DB::raw('COUNT(DISTINCT survey_question_id)'));
-            }])
-            ->first();
+            }]);
+
+        if (is_numeric($identifier)) {
+            $query->where('id', $identifier);
+        } else {
+            $query->where('identifier', $identifier);
+        }
+
+        $user = $query->first();
 
         if (!$user) {
             abort(404);