I can't reproduce this.
One thing you can do is try and reproduce it in an interactive session in order
to get more information.
So install your package:
R CMD INSTALL ASAFE
Then do the following:
cd ASAFE/vignettes
R CMD Stangle ASAFE.Rmd
This will produce a file called ASAFE.R containing
Bioconductor community --
We have a YouTube channel
https://www.youtube.com/user/bioconductor
It is poorly maintained, but even in this state it receives regular new
subscribers.
The Bioconductor core group does not have the resources or talent to
keep the channel up. Is there anyone