在Ubuntu中构建R包时构建PDF错误

Question

在检查安装在我的Ubuntu系统中的R studio中的R包开发时，我收到此错误。

LaTeX errors when creating PDF version.
 This typically indicates Rd problems.
 LaTeX errors found:
 ! Font T1/zi4/m/n/10=t1-zi4r-0 at 10.0pt not loadable: Metric    (TFM)file not found.
 <to be read again> 
 relax l.20 ...sIs{Sulthan }\email{contact@iamsulthan.in}
  ! \textfont 0 is undefined (character h).
\Url@FormatString ...\Url@String \UrlRight \m@th $

l.22 ...tps://github.com/iamsulthan/IndianTaxCalc}
                                              \AsIs{}
! \textfont 0 is undefined (character t).
\Url@FormatString ...\Url@String \UrlRight \m@th $

 l.22 ...tps://github.com/iamsulthan/IndianTaxCalc}
                                              \AsIs{}
 ! \textfont 0 is undefined (character t).
\Url@FormatString ...\Url@String \UrlRight \m@th $

 l.22 ...tps://github.com/iamsulthan/IndianTaxCalc}
                                              \AsIs{}
! \textfont 0 is undefined (character p).
 \Url@FormatString ...\Url@String \UrlRight \m@th $

  l.22 ...tps://github.com/iamsulthan/IndianTaxCalc}
                                              \AsIs{}
  ! \textfont 0 is undefined (character s).
  \Url@FormatString ...\Url@String \UrlRight \m@th $

    l.22 ...tps://github.com/iamsulthan/IndianTaxCalc}...........

我该如何解决这个问题？

文档的Github链接 https://github.com/iamsulthan/IndianTaxCalc/blob/master/man/ITI2017.Rd