How to fix Error occurred when executing KSampler: 'ModuleList' object has no attribute '1'?

We normally see this error when you mixed SD1.5 and SDXL models/loras in your workflow, please change the models to only one model series instead of mixing them.

Please see the answers here, https://github.com/LucianoCirino/efficiency-nodes-comfyui/issues/227.