Will not connect to Midas MR18 – X Air Controller Review

The app description says it works with the Midas series of mixers. These are functionally similar to the Behringer Air series. I bought the app specifically to pair with the MR18. I does not pair, so is useless. Bought an app from a different developer and pairs fine. Happy to change my rating and review if this gets corrected.
Review by artist of the spirt on X Air Controller.