Thanks for the question. Mold in your bokashi bucket can be a sign that things are working well, or a sign that something has gone wrong. It really depends what color the mold is. White mold is absolutely fine. It is a sign that some air is getting in to the bucket (which is not ideal) but it is also a sign that the bokashi microbes are healthy and multiplying. Blue/black/green molds are all signs of putrification and suggest that something is wrong in the bokashi bucket.
Lots more information about mold in your bokashi bucket here: https://bokashiliving.com/mold-in-your-bokashi-bucket/
Happy composting 🙂