title: Azure Durable Function Error "No activity functions are currently registered!"
body: <p>Full Message:</p>
  
  <pre class="lang-none prettyprint-override"><code>Function 'Function1 (Orchestrator)' failed with an error. 
  Reason: System.ArgumentException: 
  The function 'Function1_GetData' doesn't exist, 
  is disabled, or is not an activity function. 
  Additional info: No activity functions are currently registered!
  </code></pre>
  
  <pre class="lang-cs prettyprint-override"><code>[FunctionName("Function1")]
      public static async Task&lt;List&lt;string&gt;&gt; RunOrchestrator([OrchestrationTrigger] DurableOrchestrationContext context) {
          var outputs = new List&lt;string&gt;();
  
          using (var efContext = new DbContext()) {
              foreach (var s in efContext.Table) {
                  var x= await context.CallActivityAsync&lt;bool&gt;("Function2_GetSummonerChanges", s.Id);
                  outputs.Add(x.ToString());
              }
          }
          context.ContinueAsNew(null);
          return outputs;
      }
  
  [FunctionName("Function1_GetData")]
      public static bool GetData(long Id) {
          return true;
      }
  </code></pre>