Error(s) in re-building vignettes:
--- re-building 'LinkWeightsAnalysis.Rmd' using rmarkdown
trying URL 'https://s3.us-east-2.amazonaws.com/earthstatdata/HarvestedAreaYield175Crops_Indvidual_Geotiff/potato_HarvAreaYield_Geotiff.zip'
Content type 'application/zip' length 10812124 bytes (10.3 MB)
==================================================
downloaded 10.3 MB

--- finished re-building 'LinkWeightsAnalysis.Rmd'

--- re-building 'analysis.Rmd' using rmarkdown
trying URL 'https://s3.us-east-2.amazonaws.com/earthstatdata/HarvestedAreaYield175Crops_Indvidual_Geotiff/avocado_HarvAreaYield_Geotiff.zip'
Content type 'application/zip' length 6271196 bytes (6.0 MB)
==================================================
downloaded 6.0 MB

trying URL 'https://dataverse.harvard.edu/api/access/datafile/3985008?format=original'

Quitting from lines 217-223 [fetch_sp_ba] (analysis.Rmd)
Error: processing vignette 'analysis.Rmd' failed with diagnostics:
unable to find an inherited method for function 'sources' for signature 'x = "NULL"'
--- failed re-building 'analysis.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'LinkWeightsAnalysis.Rmd' using rmarkdown
trying URL 'https://s3.us-east-2.amazonaws.com/earthstatdata/HarvestedAreaYield175Crops_Indvidual_Geotiff/potato_HarvAreaYield_Geotiff.zip'
Content type 'application/zip' length 10812124 bytes (10.3 MB)
==================================================
downloaded 10.3 MB

--- finished re-building 'LinkWeightsAnalysis.Rmd'

--- re-building 'analysis.Rmd' using rmarkdown
trying URL 'https://s3.us-east-2.amazonaws.com/earthstatdata/HarvestedAreaYield175Crops_Indvidual_Geotiff/avocado_HarvAreaYield_Geotiff.zip'
Content type 'application/zip' length 6271196 bytes (6.0 MB)
==================================================
downloaded 6.0 MB

trying URL 'https://dataverse.harvard.edu/api/access/datafile/3985008?format=original'

Quitting from lines 217-223 [fetch_sp_ba] (analysis.Rmd)
Error: processing vignette 'analysis.Rmd' failed with diagnostics:
unable to find an inherited method for function 'sources' for signature 'x = "NULL"'
--- failed re-building 'analysis.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'LinkWeightsAnalysis.Rmd' using rmarkdown
trying URL 'https://s3.us-east-2.amazonaws.com/earthstatdata/HarvestedAreaYield175Crops_Indvidual_Geotiff/potato_HarvAreaYield_Geotiff.zip'
Content type 'application/zip' length 10812124 bytes (10.3 MB)
==================================================
downloaded 10.3 MB

--- finished re-building 'LinkWeightsAnalysis.Rmd'

--- re-building 'analysis.Rmd' using rmarkdown
trying URL 'https://s3.us-east-2.amazonaws.com/earthstatdata/HarvestedAreaYield175Crops_Indvidual_Geotiff/avocado_HarvAreaYield_Geotiff.zip'
Content type 'application/zip' length 6271196 bytes (6.0 MB)
==================================================
downloaded 6.0 MB

trying URL 'https://dataverse.harvard.edu/api/access/datafile/3985008?format=original'

Quitting from lines 217-223 [fetch_sp_ba] (analysis.Rmd)
Error: processing vignette 'analysis.Rmd' failed with diagnostics:
unable to find an inherited method for function 'sources' for signature '"NULL"'
--- failed re-building 'analysis.Rmd'

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

Error: Vignette re-building failed.
Execution halted