Yes this is related to the app & Android N.
When Google release their preview versions they give them a version number as a letter, in this case 'N', and not 7.0. On full release they change this to a correct version number.
Our app is expecting a number, and will give you the error you have been experiencing, when there is not one.
Unfortunately, we don't support preview versions, and this error will persist in till Google do a full release.
Sorry for the bad news,