it looks like there are a couple of issues. It is a bit hard to see from the pictures but it looks like there is a good bit of moisture in your support material. This happens naturally if it has been some time since the machine was used. This could contribute but I don’t think it is the root cause.
These machines are really reliable, but I have seen this same behavior on an older dimension machine. How many hours (standby and build) are on the machine?
As was mentioned in a post before it looks like the Y axis skipped some steps and I have only seen this happen in a couple of scenarios. First is if part of the model curls up and catches on the head.
The second is if the linear bearings in the X,Y stage are failing. If these are failing, you may hear a loud click or pop occasionally as the machine is building. As the problem gets worse you will see build errors like this and eventually machine stop errors.
I was quoted about $5k to replace the stage and opted to rebuild it myself.
Feel free to reach out if the broblems continue.