** Update 02/03/2020 16:30 EET **
According to Moz the issue should be fixed.
Moz is experiencing issues with their services at the moment. This can cause problems with Supermetrics' Moz queries. Please find more information here: https://health.moz.com/
According to the status page updates Moz is aware of the issue and is currently working on a fix. We'll update this article once Moz confirms this issue to be resolved.