I'm stuck with production payment got bad request error

npm help
says:

@square/[email protected] test
npm-run-all --serial lint test:*

@square/[email protected] lint
npm-run-all --serial lint:*

@square/[email protected] lint:eslint
eslint --ignore-path .gitignore --cache .

Browserslist: caniuse-lite is outdated. Please run:
npx browserslist@latest --update-db

Why you should do it regularly:

C:\xampp\htdocs\web-payments\server\square.js
3:23 error ‘SQUARE_ACCESS_TOKEN’ is assigned a value but never used no-unused-vars
7:15 error Insert ⏎··· prettier/prettier

:heavy_multiplication_x: 2 problems (2 errors, 0 warnings)
1 error and 0 warnings potentially fixable with the --fix option.

ERROR: “lint:eslint” exited with 1.
ERROR: “lint” exited with 1.