I created a new model in Dreambooth, SD GUI 1.11.0 said it was incompatible. I re-generated it but 1.11.0 still says it is incompatible (it is one byte smaller than older models I generated).
This morning I found that it works with 1.9.1 and 1.8.1, it is based on SD 1.5 - IDK what the issue is... I tried both fp16 and 32 bit versions in all three versions, the older versions work fine.