我正在尝试将 jupyter 笔记本下载为 pdf，并且已经下载了几乎所有它说我需要的各种软件包。最近，我收到以下错误：
! LaTeX Error: File `pdfcol.sty' not found.
Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: sty)
Enter file name:
! Emergency stop.
<read *>
l.23 \pdfcolInitStack
{tcb@breakable}^^M
No pages of output.
Transcript written on notebook.log.
当我尝试通过执行 tlmgr install pdfcol 下载 pdfcol 时，我得到以下信息：
tlmgr: package repository https://ctan.math.washington.edu/tex-archive/systems/texlive/tlnet (not verified: gpg unavailable)
tlmgr install: package pdfcol not present in repository.
tlmgr: action install returned an error; continuing.
tlmgr: An error has occurred. See above messages. Exiting.
有什么解决办法吗？