Update README.md

Author: crpietschmann

12_User_Interface/README.md

@@ -27,11 +27,13 @@ These example questions are:
 - What is the SKU of HL Road Frame - Black?
 - What is HL Road Frame?
 
+> **Note**: It's possible the first time you ask a question within the Front end application there may be an error. Occasionally when the Azure Bicep template deploys the front end application there will be an issue configuring the use of the `API_ENDPOINT` app setting. If this happens, simply navigate to **Deployment** -> **Deployment Center**, then click **Sync** to have the Web App refresh the deployment of the front end app from it's GitHub repository source code. This should fix that error.
+
 The chat user interface presents as a traditional chat application style interface when asking questions.
 
 ![Chat user interface screenshot with question and generated answer displayed](images/2024-01-17-12-53-13.png)
 
-Go ahead, ask the service a few questions about CosmicWorks and observice the responses.
+Go ahead, ask the service a few questions about CosmicWorks and observe the responses.
 
 ## What do I do if the responses are incorrect?