Not able to load tidyverse . - `object 'vI' not found`

That's part of base R's package loading, I believe. It's not a constant you can just set. I could be wrong, though.
Below see all the instances of that code on GH:
https://github.com/search?q=loadNamespace(j+<-+i[[1L]]%2C+c(lib.loc%2C+.libPaths())%2C+versionCheck+%3D+vI[[j]])&type=Code

Yeah, you can see it here in the CRAN mirror: