"Error in (function (srcref) : unimplemented type (29) in 'eval'" while doing Practice Programming Assignment: swirl Lesson 1: Basic Building Blocks on Windows

[raziltahir]

Name of the course and lesson within which you are experiencing the problem
-Practice Programming Assignment: swirl Lesson 1: Basic Building Blocks

Brief description of the problem
-When I reached 18%, I got an error saying;
"Error in (function (srcref) : unimplemented type (29) in 'eval'"

Any screenshots or output that might help us visualize the problem

Your operating system (Windows, Mac, Linux, etc.)
-Windows

The output you get from typing sessionInfo() in the console:
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats graphics grDevices utils datasets methods base

loaded via a namespace (and not attached):
[1] compiler_4.0.2 tools_4.0.2