binding error

[shudson310]

I'm using OT 2.5.4 and getting the following build error:
[schematron] SLF4J: Class path contains multiple SLF4J bindings. [schematron] SLF4J: Found binding in [jar:file:/doc_builds/jenkins/workspace/tools/oxygen-publishing-engine-2.x/plugins/org.doctales.schematron/lib/slf4j-simple-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] [schematron] SLF4J: Found binding in [jar:file:/doc_builds/jenkins/workspace/tools/oxygen-publishing-engine-2.x/lib/logback-classic-1.2.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] [schematron] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. [schematron] SLF4J: Actual binding is of type [org.slf4j.impl.SimpleLoggerFactory] �[31mError: The <schematron> type doesn't support the nested "ditafileset" element.�[0m Build step 'Execute shell' marked build as failure