Thanks! I figured out the likely issue: my project is still on Godot 4.2.1, while the pack seems to require Godot 4.4 or newer.
I’m considering upgrading the project to 4.4. I’m also using strict typing, so I may need to adjust the scripts, but that should be manageable.
Just to confirm: is Godot 4.4+ the intended minimum version for this VFX pack?