I ran into this issue after installing the package today and running this example code from the Vignette:
library(roadoi)
roadoi::oadoi_fetch(dois = c(
"10.1186/s12864-016-2566-9",
"10.1103/physreve.88.012814"),
email = "[email protected]")
Maybe the vctrs:::vec_dim() used to be exported from that namespace but is no longer?