If rlang_0.4.7 is not in Session_Info() under other attached packages, try restarting the R session and update.packages)
library(rlang)
sessionInfo()
#> R version 4.0.0 (2020-04-24)
#> Platform: x86_64-pc-linux-gnu (64-bit)
#> Running under: Pop!_OS 20.04 LTS
#>
#> Matrix products: default
#> BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
#> LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0
#>
#> locale:
#> [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
#> [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
#> [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
#> [7] LC_PAPER=en_US.UTF-8 LC_NAME=C
#> [9] LC_ADDRESS=C LC_TELEPHONE=C
#> [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
#>
#> attached base packages:
#> [1] stats graphics grDevices utils datasets methods base
#>
#> other attached packages:
#> [1] rlang_0.4.7
#>
#> loaded via a namespace (and not attached):
#> [1] compiler_4.0.0 magrittr_1.5 tools_4.0.0 htmltools_0.5.0
#> [5] yaml_2.2.1 stringi_1.4.6 rmarkdown_2.3 highr_0.8
#> [9] knitr_1.29 stringr_1.4.0 xfun_0.16 digest_0.6.25
#> [13] evaluate_0.14
Created on 2020-09-03 by the reprex package (v0.3.0)