org.xml.sax.SAXParseException: Content is not allowed in prolog. ...

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org.xml.sax.SAXParseException: Content is not allowed in prolog. ...
at ch.qos.logback.classic.selector.ContextJNDISelector.configureLoggerContextByURL(ContextJNDISelector.java:161)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:273)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:241)

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