Why is Appen so low?

I've been keeping a close eye on Appen's stock price and I can't help but notice that it's been trending lower recently. Could you shed some light on the reasons behind this decline? Is it due to a decline in the company's performance, a shift in market sentiment, or perhaps a combination of factors? I'm particularly interested in understanding the underlying dynamics that are driving this downward trend and how investors should be thinking about Appen's future prospects in light of this situation.