Expo Fails with “Unexpected Token”

[pixeldroid]

Hello:
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.
I have uninstalled/reinstalled node and yarn, but no luck!

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

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