Error(s) in re-building vignettes:
--- re-building 'USCSXenaTools.Rmd' using rmarkdown
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUNG.sampleMap/LUNG_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUNG.sampleMap/LUNG_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUNG.sampleMap/LUNG_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUNG.sampleMap/LUNG_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUNG.sampleMap/LUNG_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUNG.sampleMap/LUNG_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUAD.sampleMap/LUAD_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUAD.sampleMap/LUAD_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUAD.sampleMap/LUAD_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUAD.sampleMap/LUAD_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUAD.sampleMap/LUAD_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUAD.sampleMap/LUAD_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUSC.sampleMap/LUSC_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUSC.sampleMap/LUSC_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUSC.sampleMap/LUSC_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUSC.sampleMap/LUSC_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUSC.sampleMap/LUSC_clinicalMatrix'
trying URL 'https://xena-tcga.hiplot.com.cn/download/TCGA.LUSC.sampleMap/LUSC_clinicalMatrix'
Quitting from lines 151-154 (USCSXenaTools.Rmd) 
Error: processing vignette 'USCSXenaTools.Rmd' failed with diagnostics:
object 'res' not found
--- failed re-building 'USCSXenaTools.Rmd'

SUMMARY: processing the following file failed:
  'USCSXenaTools.Rmd'

Error: Vignette re-building failed.
Execution halted