Fix Buffer is undefined for react-script 5.0.0

[FrameMuse]

There is a error using react-script 5.0.0

Fix:

• npm i buffer
• add import { Buffer } from "buffer" or:
• use Uint8Array, it seems it works as Buffer in this case

[ajfunelas]

My temporary workaround was downgrading from react-scripts 5.0.1 to 4.0.3