Hello, this is Team Iskra.
There was a temporary service suspension on the Swap services for GRAM and CANDY due to a issue with our partner as of 11/17. The issue has been resolved, so you can trade GRAM and CANDY in the Iskra swap again from 12/8 6AM(UTC).
We responded to the failure immediately after recognizing the issue and completely fixed the failure. You can now enjoy the service as usual.
We apologize for any inconvenience that the recent service suspension has caused.
We will make our best endeavors to manage our service thoroughly so that the same problem does not recur in the future.
Thank you.
Team Iskra