I also am having this issue however, it appears to go away once I removed roomSession.stop() that was being called before the session started
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I did find a workaround for this, simply wrap your Data object in a Codable struct, like this...
struct DrawingData: Codable {
var data: Data
init(data: Data) {
self.data = data
}
}
When you initialize the Model class, make sure to call an init with drawingData (or whatever variable type, as long as it's a codable struct) that is of type DrawingData (or whatever you rename this to).
Prior to wrapping the Data object, I had the same crash you all are reporting.
I also filed feedback :)
Similar issue, solved by unpairing my old watch and connecting Xcode and toggling developer mode on the watch directly