如何在R中编织为PDF

Question

当我尝试编织为pdf时，我不明白为什么会出现此错误。在上一份作业中，我能够将其编成pdf，所以我不明白这是什么问题。

Output file: Edith_HW2.knit.md

! Package inputenc Error: Unicode character ̣ (U+0323)
(inputenc)                not set up for use with LaTeX.

Try other LaTeX engines instead (e.g., xelatex) if you are using pdflatex. For R Markdown users, see https://bookdown.org/yihui/rmarkdown/pdf-document.html
Error: Failed to compile Edith_HW2.tex. See https://yihui.name/tinytex/r/#debugging for debugging tips. See Edith_HW2.log for more info.
Execution halted