Error(s) in re-building vignettes:
  ...
--- re-building 'my-vignette.Rmd' using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
server certificate verification failed. CAfile: none CRLfile: none
--- failed re-building 'my-vignette.Rmd'

SUMMARY: processing the following file failed:
  'my-vignette.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘my-vignette.Rmd’ using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette ‘my-vignette.Rmd’ failed with diagnostics:
server certificate verification failed. CAfile: none CRLfile: none
--- failed re-building ‘my-vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘my-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘my-vignette.Rmd’ using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
SSL certificate problem: certificate has expired
--- failed re-building ‘my-vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘my-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘my-vignette.Rmd’ using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
SSL certificate problem: certificate has expired
--- failed re-building ‘my-vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘my-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'my-vignette.Rmd' using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
schannel: next InitializeSecurityContext failed: SEC_E_CERT_EXPIRED (0x80090328) - Das empfangene Zertifikat ist abgelaufen.
--- failed re-building 'my-vignette.Rmd'

SUMMARY: processing the following file failed:
  'my-vignette.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'my-vignette.Rmd' using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
schannel: next InitializeSecurityContext failed: SEC_E_CERT_EXPIRED (0x80090328) - The received certificate has expired.
--- failed re-building 'my-vignette.Rmd'

SUMMARY: processing the following file failed:
  'my-vignette.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘my-vignette.Rmd’ using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
server certificate verification failed. CAfile: none CRLfile: none
--- failed re-building ‘my-vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘my-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘my-vignette.Rmd’ using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
server certificate verification failed. CAfile: none CRLfile: none
--- failed re-building ‘my-vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘my-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'my-vignette.Rmd' using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
SSL certificate problem: certificate has expired
--- failed re-building 'my-vignette.Rmd'

SUMMARY: processing the following file failed:
  'my-vignette.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'my-vignette.Rmd' using rmarkdown
Quitting from lines 25-29 (my-vignette.Rmd) 
Error: processing vignette 'my-vignette.Rmd' failed with diagnostics:
SSL certificate problem: certificate has expired
--- failed re-building 'my-vignette.Rmd'

SUMMARY: processing the following file failed:
  'my-vignette.Rmd'

Error: Vignette re-building failed.
Execution halted