Error(s) in re-building vignettes:
  ...
--- re-building ‘data_protocol.Rmd’ using rmarkdown

Quitting from data_protocol.Rmd:21-23 [load-epiparameter]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! package or namespace load failed for 'epiparameter':
 .onLoad failed in loadNamespace() for 'epiparameter', details:
  call: file()
  error: cannot open the connection
---
Backtrace:
    ▆
 1. └─base::library(epiparameter)
 2.   └─base::tryCatch(...)
 3.     └─base (local) tryCatchList(expr, classes, parentenv, handlers)
 4.       └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
 5.         └─value[[3L]](cond)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'data_protocol.Rmd' failed with diagnostics:
package or namespace load failed for 'epiparameter':
 .onLoad failed in loadNamespace() for 'epiparameter', details:
  call: file()
  error: cannot open the connection
--- failed re-building ‘data_protocol.Rmd’

--- re-building ‘database.Rmd’ using rmarkdown

Quitting from database.Rmd:13-41 [unnamed-chunk-1]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! package or namespace load failed for 'epiparameter':
 .onLoad failed in loadNamespace() for 'epiparameter', details:
  call: file()
  error: cannot open the connection
---
Backtrace:
    ▆
 1. └─base::library("epiparameter")
 2.   └─base::tryCatch(...)
 3.     └─base (local) tryCatchList(expr, classes, parentenv, handlers)
 4.       └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
 5.         └─value[[3L]](cond)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'database.Rmd' failed with diagnostics:
package or namespace load failed for 'epiparameter':
 .onLoad failed in loadNamespace() for 'epiparameter', details:
  call: file()
  error: cannot open the connection
--- failed re-building ‘database.Rmd’

--- re-building ‘design_principles.Rmd’ using rmarkdown
--- finished re-building ‘design_principles.Rmd’

--- re-building ‘epiparameter.Rmd’ using rmarkdown
--- finished re-building ‘epiparameter.Rmd’

--- re-building ‘extract_convert.Rmd’ using rmarkdown
--- finished re-building ‘extract_convert.Rmd’

SUMMARY: processing the following files failed:
  ‘data_protocol.Rmd’ ‘database.Rmd’

Error: Vignette re-building failed.
Execution halted