plotVCF requires some other R packages in order to run, you can take a look at DESCRIPTION Imports and Depends section if you want to have an updated view of dependencies.

As example, at the time of writing:

Imports: tidyverse (>= 1.3.2), GenomicFeatures (>= 1.48.4), Biostrings (>= 2.64.1), ggbio (>= 1.44.1), Depends: VariantAnnotation (>= 1.42.1), dplyr, R (>= 2.10) 

but we do not exclude that this list will grow up in the future.

As explained in plotVCF Installation page, R will check that your library contains those packages with the specified versions and, in case it does not, they will be installed with plotVCF installation