Error on npm start

[charlieohlin]

Hello,

Im getting this error when trying to start a local server. Im running WSL and have restarted and verified packages are installed.

` [email protected] start

concurrently "PORT=9877 react-scripts start" "cd server && ./run.sh"

/home/choh/bgbye/node_modules/concurrently/dist/src/command.js:78
exitCode: exitCode ?? String(signal),
^

SyntaxError: Unexpected token '?'
at wrapSafe (internal/modules/cjs/loader.js:915:16)
at Module._compile (internal/modules/cjs/loader.js:963:27)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
at Module.load (internal/modules/cjs/loader.js:863:32)
at Function.Module._load (internal/modules/cjs/loader.js:708:14)
at Module.require (internal/modules/cjs/loader.js:887:19)
at require (internal/modules/cjs/helpers.js:85:18)
at Object. (/home/choh/bgbye/node_modules/concurrently/dist/src/index.js:4:19)
at Module._compile (internal/modules/cjs/loader.js:999:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)`