repotted bonsai problem

repotted bonsai problem

I repotted my schleferra bonsai after 9 years in the same pot and it is not doing well. The leaves are turning black and are dropping off. I used a bonsai potting mix that I bought at a flower show and fed it a bit of bonsai fertilizer. Plant is definitely not over-watered and it is getting a fair amount of bright light. Is there anything else I can do? I've had it for so long; I wish I hadn't repotted it :(
hellloo

hellloo

Hoping someone can name this plant

Hoping someone can name this plant

Plant ID and a Thanks

Plant ID and a Thanks

Fruits of our labor

Fruits of our labor

what to do with magazines??

what to do with magazines??

Productive weekend

Productive weekend