Checkout endpoint gives 500 internal server error
I didn't touched anything, this endpoint worked for over a year (all (!) other endpoints still work).
Support redirected me to the forum for help.
I also tried several methods of cURL'ing (with the Basic auth passed, and not in the URL, ...) but all of these result in the same response.
The statuspage of Lightspeed itself says all is green, so that seems in order. Support also told me nothing has changed on their end of the API, so ...
The api_key and api_secret are redacted here. The cluster is: webshopapp.