Error: Missing message for key "label.username" in bundle "(default bundle)" for locale en_IN

Error: HTTP Status 500 - javax.servlet.ServletException: javax.servlet.jsp.JspException: Missing message for key "label.username" in bundle "(default bundle)" for locale en_IN

struts.config file
<message-resources parameter="resource.MessageResource" />

Folder Structure

Solution:

Change the struts.config file line to given below
<message-resources parameter="MessageResource" />