Space Exploration uses the "fork_chance_increase_per_quality_level_chain_active_trigger" setting, but the config option in settings only shows up if space age is enabled, so the mod crashes on load with

Failed to load mods: adjustable-quality/data-final-fixes.lua:1: attempt to index field '?' (a nil value).

I've fixed it on my end by expanding the settings conditional for that on line 505 of settings.lua from:

if mods["space-age"] then

to

if mods["space-age"] or mods["space-exploration"] then

thanks for the feedback, I have been inactive for quite some time so its good timing that I checked comments just when this is happening. :)

I took a quick look, and the current implementation is this:
if mods["space-age"] or (mods["space-exploration"] and mods["quality-se"]) then

do you have a different quality mod enabled for space exploration?

I guess I can just remove the additional quality-se condition since it should be harmless. If you have this mod and SE loaded, you must have some form of quality loaded as well lol

ok, update is live. It should fix your crash, as well as include some more advanced support for Additional-Qualities mod infinite tiers.

SE has experimental support for Quality baked in currently, quality-se has been deprecated for a few months. If both SE and Quality are loaded now, SE gets a startup option to enable quality. Thanks for the fix!

that's good news for quality lovers! glad I was able to help resolve this without much issue.