Square payment plugin giving error

I have purchased, installed and setup the Square payment method plugin

I've set it up on the site and followed the instructions in the documentation. But when trying to put a payment through, I'm getting an error:

Api response has Errors

❌ This request could not be authorized.

Any ideas please?

Hello,

Can give us more information through some screenshots for exemple about :
- how you configured you Square payment method ("Hikashop->System->Payment methods")
- which step you are having that issue

You can send it via email : tsukidev.contact[at]gmail[dot]com