Help - Error 500 (MOValidationError)

Hi,

For Every Page hit, we are getting below errors in catalina.out log. After long analysis found that this is because of "bootstrap.min.css". Anyone using bootstrap.min.css and how to avoid this error. Kindly please help on this.

Thanks

Jayaram

[2016-08-08 11:35:46,802][ERROR][               java.lang.Class][http-bio-9090-exec-10] - The language code specified is invalid: 'themes'.
com.vignette.as.client.exception.ValidationException: 08/08/2016 11:35:46:802, Error 500 (MOValidationError), Message 026-430-0002: The language code specified is invalid: 'themes'.
        at com.vignette.as.client.exception.ValidationException.getOne(ValidationException.java:203)
        at com.vignette.as.client.javabean.AsLocale.calculateLocaleId(AsLocale.java:721)
        at com.vignette.as.client.javabean.AsLocale.calculateLocaleId(AsLocale.java:690)
        at com.vignette.ext.furl.context.resolver.LocaleURLContextResolver.validateLocale(LocaleURLContextResolver.java:220)
        at com.vignette.ext.furl.context.resolver.LocaleURLContextResolver.resolve(LocaleURLContextResolver.java:181)
        at com.vignette.ext.furl.context.ResolverURLContextBuilder.build(ResolverURLContextBuilder.java:57)
        at com.vignette.ext.furl.processor.URLProcessor.process(URLProcessor.java:124)
        at com.vignette.ext.furl.servlet.FriendlyURLFilter.doFilter(FriendlyURLFilter.java:94)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:724)