Glide "format" parameter does not exist.

I'm continually getting this when trying to set up a glide instance. I've tried it several times as I'm working through this project and haven't been able to figure it out.

Template code:

{{ glide:block_image_hero width="2000" filter="sepia" quality="80" format="jpg" }}

Error code output through debugger:

LOG.error: Glide URL parameter [format] does not exist

My objective is to be able to force PNG and PJPG in certain areas.