bug reports

[????]

Sorry, when I run "tinytex::install_tinytex()  # install TinyTeX" in 
Rstudio,
I don't know what happed about the below problem, I do nothing, is 
"cmd.exe" missing?  
Looking forward to your reply, thanks!



Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.
Setting up lz4 with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/lz4/lz4.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\lz4\lz4.exe didn't work
*** LZ4 command line interface 32-bits v1.9.3, by Yann Collet ***
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.
Setting up xz with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/xz/xz.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\xz\xz.exe didn't work
xz (XZ Utils) 5.2.5
liblzma 5.2.5
Use of uninitialized value $ver in scalar chomp at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLWinGoo.pm line 194.

Use of uninitialized value $ver in substitution (s///) at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLWinGoo.pm line 195.
Use of uninitialized value $ver in substitution (s///) at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLWinGoo.pm line 195.
Use of uninitialized value $ver in scalar chomp at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLWinGoo.pm line 194.
Use of uninitialized value $ver in substitution (s///) at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLWinGoo.pm line 195.
Use of uninitialized value $ver in substitution (s///) at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLWinGoo.pm line 195.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.
Setting up tar with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/tar.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\tar.exe didn't work
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.

Setting up curl with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/curl/curl.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\curl\curl.exe didn't work
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.
Setting up wget with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/wget/wget.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\wget\wget.exe didn't work
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.
Setting up lz4 with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/lz4/lz4.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\lz4\lz4.exe didn't work
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2691.
Can't spawn "cmd.exe": No such file or directory at 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/TeXLive/TLUtils.pm line 2708.
Setting up xz with 
C:/Users/admin/AppData/Roaming/TinyTeX/tlpkg/installer/xz/xz.exe as 
C:\Users\admin\AppData\Roaming\TinyTeX\tlpkg\installer\xz\xz.exe didn't work