React-Native/Expo/Cygwin “Unexpected Token” Problem

Hi all:
I have a very tricky problem.
After installing react-devtools, I am no longer able to run expo-cli.
Everything was working fine until I did that. I’m now getting the error below.
In addition to not being able to run expo, my Powershell permissions were also changed to "restricted" (fixed). I even restored my registry to the previous day in an effort to fix this.
I have uninstalled/reinstalled node and yarn.

The error indicates Cygwin, which I don't have installed on my computer (does not show up in a registry search), however, searching my computer, I see that Cygwin was installed with Git:
C:\Program Files\Git\usr\share\cygwin
C:\Program Files\Git\usr\bin\cygwin-console-helper.exe
C:\Program Files\Android\Android Studio\bin\lldb\lib\distutils\cygwinccompiler.py
C:\Program Files\Git\usr\lib\perlS\core_per|\File\Spec\cygwin.pm
C:\Program Files\Git\usr\share\cygwin\cygwin.ldif
C:\Program Files\Git\usr\share\tern1info\63\cygwin
C:\Program Files\Git\usr\lib\terminf0\63\cygwin

Any help will be GREATLY appreciated.
Windows 10
npm: 6.6.0
node: v10.15.0
yarn: v1.13.0

ERROR
expo start --android
At C:\Users\name\AppData\Local\Yarn\bin\expo.ps1:5 char:13
+ CYGWIN) basedir=cygpath -w "$basedir";;
+
Unexpected token ')' in expression or statement.
At C:\Users\name\AppData\Local\Yarn\bin\expo.ps1:8 char:3
+ if [ -x "$basedir/pwsh" ]; then
+
Missing '(' after 'if' in if statement.
At C:\Users\name\AppData\Local\Yarn\bin\expo.ps1:8 char:5
+ if [ -x "$basedir/pwsh" ]; then
+
Missing type name after '['.
At C:\Users\name\AppData\Local\Yarn\bin\expo.ps1:9 char:20
+... edir/pwsh" "$basedir/../Data/global/node_modules/.bin/expo.ps1" "$@" ...
+
Unexpected token '"$basedir/../Data/global/node_modules/.bin/expo.ps1"' in expression or statement.
At C:\Users\name\AppData\Local\Yarn\bin\expo.ps1:9 char:73
+ ... edir/pwsh" "$basedir/../Data/global/node_modules/.bin/expo.ps1" "$@"
+
Unexpected token '"$@"' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParseException
+ FullyQualifiedErrorId : UnexpectedToken