Simulacrius' new infinite research conflicts with other research mods, specifically this one:
https://mods.factorio.com/mod/more-infinite-research
Completely disabling that mod researches

I think for an easy fix it's possible to add an option to disable the Simulacrius' researches in the settings?
Or straight away fixing the issue would be really appreciated

Sorry that I am not sure what do you mean by "Simulacrius' new infinite research".

For researches in this mod, it should have only "rearranged" the research tree by altering some research prerequisites and introduced a new "non-spaceship" recipe for promethium science pack. In other words, it does not introduce new infinite researches.

Could you share more information regarding which exact researches are conflicting and are there any error messages produced?