HTTP ERROR 500 javax.servlet.ServletException: javax.servlet.ServletException: An error occurred while processing request to /exist/apps/hsg-shell/milestones/1866-1898/spanish-american-war&lang=en: err:XPST0003 Invalid character (=) in entity name (lang) or missing ;

URI:/exist/apps/hsg-shell/milestones/1866-1898/spanish-american-war&lang=en
STATUS:500
MESSAGE:javax.servlet.ServletException: javax.servlet.ServletException: An error occurred while processing request to /exist/apps/hsg-shell/milestones/1866-1898/spanish-american-war&lang=en: err:XPST0003 Invalid character (=) in entity name (lang) or missing ;
SERVLET:XQueryURLRewrite
CAUSED BY:javax.servlet.ServletException: javax.servlet.ServletException: An error occurred while processing request to /exist/apps/hsg-shell/milestones/1866-1898/spanish-american-war&lang=en: err:XPST0003 Invalid character (=) in entity name (lang) or missing ;
CAUSED BY:javax.servlet.ServletException: An error occurred while processing request to /exist/apps/hsg-shell/milestones/1866-1898/spanish-american-war&lang=en: err:XPST0003 Invalid character (=) in entity name (lang) or missing ;
CAUSED BY:org.exist.xquery.XPathException: err:XPST0003 Invalid character (=) in entity name (lang) or missing ;

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