报错：\XDUfrontmatter未定义，CJK字体相关错误。

[RenShijie]

具体错误如下：
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined control sequence. \XDUfrontmatter
Undefined CJK default family \CJKrmdefault' has been(xeCJK) replaced by song'.
Font shape U/rsfs/m/n' in size <10.53937> not available(Font) size <10.95> substituted Font shape OMS/rsfs/m/n' in size <10.53937> not available(Font) size <10.95> substituted
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Overfull \hbox (56.79721pt too wide) in paragraph
Underfull \vbox (badness 10000) has occurred while \output is active []
Underfull \vbox (badness 10000) has occurred while \output is active []
Underfull \vbox (badness 10000) has occurred while \output is active []
Underfull \vbox (badness 10000) has occurred while \output is active []
Underfull \hbox (badness 10000) in paragraph
Underfull \hbox (badness 10000) in paragraph
Underfull \vbox (badness 2626) has occurred while \output is active []
Size substitutions with differences(Font) up to 0.41063pt have occurred.
Label(s) may have changed. Rerun to get cross-references right.
使用环境：TeXLive 2021 + TeXstudio 3.1.2 (Win10系统)
老师，这个问题出在哪呢？

[RenShijie]

是因为logo图片的问题吗？TeXLive 2019可以编译通过，但是出来的PDF封面没有LOGO

[zzbb9944]

你好同学，我也遇到了这个问题，请问怎么解决呀