[R] error while loading ggplot2

[shijin mathew]

Getting the following error while loading ggplot2.

> library(ggplot2)
Error: package or namespace load failed for ‘ggplot2’ in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]):
 object 'vI' not found
Tried different version of R and ggplot2 but still doesnt work.
Any help to resolve is appreciated. Appreciate any pointers.
-S

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