npm encoding err (local machine problem probs)

[bgdnvk]

PS E:\prg2020\github stuff\customer-support\frontend> npm i jwt
npm ERR! code 1
npm ERR! path E:\prg2020\github stuff\customer-support\frontend\node_modules\node-base64
npm ERR! command failed
npm ERR! command C:\Windows\system32\cmd.exe /d /s /c ./install.sh
npm ERR! '.' is not recognized as an internal or external command,
npm ERR! operable program or batch file.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\bg\AppData\Local\npm-cache_logs\2023-05-26T03_00_45_474Z-debug-0.log

[bgdnvk]

I'm giving up

https://stackoverflow.com/questions/20992723/npm-is-not-recognized-as-internal-or-external-command-operable-program-or-bat