Your stack trace compared to the selected pattern
In general such issue appears of non-existence locale or the MessageBundle is configured improperly.
For example, if you have messages.properties and messages_en.properties bundle, then bundle name is messages. If you have them in the WEB-INF folder, then base name is /WEB-INF/messages, i.e. according to /path/to/bundle/bundlename
The xml configuration looks like this
<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource" p:basename="/WEB-INF/messages" />
Also check the message code exists in your messages_<locale>.properties file.