GenerationError -1 / 1026

Hi,

I was using Foundation Models in my app, and suddenly it just stopped working from one moment to the next. To double-check, I created a small test in Playgrounds, but I’m getting the exact same error there too.

#Playground {
    let session = LanguageModelSession()
    let prompt = "please answer a word"
    do {
        let response = try await session.respond(to: prompt)
    } catch {
        print("error is \(error)")
    }
}

error is Error Domain=FoundationModels.LanguageModelSession.GenerationError Code=-1 "(null)" UserInfo={NSMultipleUnderlyingErrorsKey=(
    "Error Domain=ModelManagerServices.ModelManagerError Code=1026 \"(null)\" UserInfo={NSMultipleUnderlyingErrorsKey=(\n)}"
)}

I’m no longer able to get any response from the framework anywhere, even in a fresh project. It's been 5 days.

Has anyone else experienced this issue or knows what could be causing it?

Thanks in advance!

Tahoe 26.2 beta 1, Xcode 26.1.1, iPhone Air simulator 26.1