When i tried to load library(dplyr) i got this error
Error in namespaceExports(ns,exports)
undefined exports:R6class,is.R6,is.R6class
In addition: Warning message :
S3 methods 'as.list.R6','format.R6','format.R6classGenerator','plot.R6','print.R6ClassGenerator' were declared in
NAMESPACE but not found
Error: package or namespace load failed for 'dplyr'
i am using rstuio 0.99.878 and r for windows 3.3.3.