运行报错问题

[GitHub0Yulin]

求问运行突然遇到“expl3.sty”文件错误怎么解决？
报错信息：
LaTeX3 Error: Mismatched LaTeX support files detected. \ExplLoaderFileDate{expl3.sty}}
Undefined control sequence. \sys_if_output_pdf:TF
LaTeX3 Error: Control sequence \ifctexpdf already defined. { \cs_new_eq:NN \ifctexpdf

[note286]

参考 #72 。