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Hello,
In the past weeks my Acer was just fine and with a nice green, but in the last few days the leaves and the stems have been withering and I don't understand why. Some leaves also are a bit brown at the tips. One or two small ones fell. At the store when I bought it two months ago, I was told the tree just needs the early morning sun, and I followed his instructions. Can you identify what I did wrong or if it's a symptom of a disease?

Thanks in advance

I'm not an acer specialist ( i only have one) but liverwort on the soil is always a sign of wet soil. No idea if that is causing the problem but the acer specialists here will know.