The documentation page API/MODELS/&AMP;NUM;DIFFUSERS.AUTOENCODERKL.IN_CHANNELS doesn’t exist in v0.28.0, but exists on the main version. Click <a href="/docs/diffusers/main/en/api/models/&amp;num;diffusers.AutoencoderKL.in_channels">here</a> to redirect to the main version of the documentation.