“SyntaxError: Unexpected token < in JSON at position 0” Error while editing order by staff?

Question

opencart

When editing an order, the following error
occurs: “SyntaxError: Unexpected token < in JSON at position 0”


And I don’t have such an error from the admin account.
Somewhere too clever in access rights?

Answer 1

Apparently, when sending data to the server, you need to specify either headers, or additional keys (login, token, something else), or some other small things - the system cannot recognize your request as authorized.