errores subir epub ibook

¿Me podeis decir como se arreglan estas incidencias?

ERROR ITMS-9000: "ok_SBV127_EBOOK_TEMA_UNO_US_GAAP.epub: OEBPS/Text/PracticaCuestionarioCON.xhtml(13): element "u" not allowed anywhere; expected the element end-tag, text or element "a", "abbr", "acronym", "applet", "b", "bdo", "big", "br", "cite", "code", "del", "dfn", "em", "i", "iframe", "img", "ins", "kbd", "map", "noscript", "ns:svg", "object", "q", "samp", "script", "small", "span", "strong", "sub", "sup", "tt" or "var" (with xmlns:ns="http://www.w3.org/2000/svg"). This error occurs 121 times." at Book (MZItmspBookPackage)

ERROR ITMS-9000: "ok_SBV127_EBOOK_TEMA_UNO_US_GAAP.epub: OEBPS/Text/PracticaCuestionarioCON.xhtml(26): element "u" not allowed anywhere; expected the element end-tag, text or element "a", "abbr", "acronym", "address", "applet", "b", "bdo", "big", "blockquote", "br", "cite", "code", "del", "dfn", "div", "dl", "em", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "i", "iframe", "img", "ins", "kbd", "map", "noscript", "ns:svg", "object", "ol", "p", "pre", "q", "samp", "script", "small", "span", "strong", "sub", "sup", "table", "tt", "ul" or "var" (with xmlns:ns="http://www.w3.org/2000/svg"). This error occurs 20 times." at Book (MZItmspBookPackage)

ERROR ITMS-9000: "ok_SBV127_EBOOK_TEMA_UNO_US_GAAP.epub: OEBPS/Text/PracticaCuestionarioCON.xhtml(19): non-standard image resource 'OEBPS/Images/ok_TEMA01_IMAGEN05_SBV127.bmp' of type 'image/bmp'" at Book (MZItmspBookPackage)