Possible issue with RCVimagery files in package

[williamlai2]

Hi, I've been working through the imagery and classification models page. While there have been a few issues in the text, I've been able to work through them. However I've had trouble with these files:

trainPolys9 <- vect(ex("RCVimagery/train_polys9.shp"))

Error: [vect] Cannot open this file as a SpatVector
sf::st_read(system.file("RCVimagery/train_polys9.shp", package="igisci"))
Error: dsn must point to a source, not an empty string.

Is there something wrong with them? The same with the other .shp files in that folder later in the script.