slf4j logback Groovy issue

[Timothy John]

Hi,

Anybody experience the error below ?

08:56:16,774 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.groovy] at [file:/opt/redbox/server/jetty/resources/logback.groovy]
08:56:16,782 |-ERROR in ch.qos.logback.classic.LoggerContext[default] - Groovy classes are not available on the class path. ABORTING INITIALIZATION.

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Thanks
Timothy