your lead overrides Brevven's lead recipes and since Murias lead doesnt spawn on nauvis, researches that are unlocked by smelting lead from brevven's cannot be unlocked since the recipe uses your lead and i cannot get it

i do not know how the brevven mod works, you should ask for compatibility there

got it

Brevven doesn't update his mods since a real long time sadly I don't think we will see any compatibility updates or 2.0 port of missing mods like salt & chlorine on his end

I do not know what to do then,

Brevven doesn't update his mods since a real long time sadly I don't think we will see any compatibility updates or 2.0 port of missing mods like salt & chlorine on his end

There are forks by cackling.fiend which are still maintained. You could try asking them. Though I have heard that they are presently busy, so the request may take time to be fulfilled. But it shouldn’t be forever.

The cackling fiend mods are just 2.0 compatible ports of the 1.1 versions, the 2.0 updated by brevven includes the Space Age stuff like generating vaccuum for titanium plates on foundries or all the extra gleba fun stuff with biochambers.