Error when trying to authenticate with opencart

[Marty-f13]

Having this error when trying to regiseter open cart with my square app:

 An error was encountered while refreshing the token: The `Authorization` http header of your request was malformed. The header value is expected to be of the format "Bearer TOKEN" (without quotation marks), where TOKEN is to be replaced with your access token (e.g. "Bearer ABC123def456GHI789jkl0"). For more information, see https://docs.connect.squareup.com/api/connect/v2/#requestandresponseheaders. If you are seeing this error message while using one of our officially supported SDKs, please report this to developers@squareup.com.×

 Your Square access token has expired or has been revoked! Click here to re-authorize the Square extension.

[Seamus]

Hey Marty-f13,

Thanks for getting in touch.

This is a web developer error saying something has gone wrong on the back-end of Open Cart's integration with Square. It'll likely need a developer from Open Cart who works with our APIs to take a further look.

Because Open Cart build the integration between their system and Square I'd recommend raising a support ticket with them and also commenting on their integration page - it seems like they're fairly responsive!