An error occured :(

Error code : err:FODC0002
Error stack trace : Stopped at /srv/basex/webapp/synopsx/workspace/acadmed-biblio/models/banm.xqm, 241/22: [FODC0002] "" (Line 11): The markup in the document following the root element must be well-formed. Stack Trace: - /srv/basex/webapp/synopsx/workspace/acadmed-biblio/models/banm.xqm, 22/28 - /srv/basex/webapp/synopsx/models/synopsx.xqm, 169/36 - /srv/basex/webapp/synopsx/models/synopsx.xqm, 169/51