That seems to have done it, it's working now. Thanks!

Okay, the only other thing I can suggest is to go into your Steam Workshop subscription settings and check the load order for the mods to which you are subscribed.

You should be able to see these options by right clicking Starbound in your library and then clicking on Properties, then clicking on the Workshop tab.

I've also adjusted this mod to require Irisil as part of its load order - but you may need to unsub and resub to both mods to see the changes on your side

I don't have any other mods that I know of that do anything to the loading screen besides this one:
https://sp.zhabite.com/sharedfiles/filedetails/?id=3149944882
My loading screen is still empty aside from the default protectorate logo and the little dancing creature, with or without the above mod. I have some mods that mess with the title screen but this mod doesn't seem to interfere with them. I do have a lot of mods though so it's very possible one of them causes a problem with this somehow.

It's tested and working on my side - I tested with unpacked Irisil as well as Steam Workshop Irisil

The patch checks the first 10 panels for the load screen. Are you using a mod that adds more than 10 images to the load screen?

This doesn't seem to be working for me.