Hello!
We have first / last datetime measures that are using min / max aggregation types that have recently (in the last ~16 hours) started returning an AQL Compilation Error. However, within a visualization, we can still pull in the date dimension and apply a min / max aggregation with no error. We have also been able to resolve the error on the modeling side by using a custom SQL aggregation type & applying the min/max at the definition.
We can unblock this via the workarounds above, but wanted to open the topic and flag!