Failed to load mods: modular-trains/prototypes/recipe-updates.lua:55: module quality.prototypes.recycling not found; no such file quality/prototypes/recycling.lua
stack traceback:
[C]: in function 'require'
modular-trains/prototypes/recipe-updates.lua:55: in main chunk
[C]: in function 'require'
modular-trains/data-updates.lua:8: in main chunk

Mods enabled - SA, recycler, quality, elevated rails, modular trains, modular trains SA graphics.

Failed to load mods: Error while loading item prototype "diesel-fuel" (item): ItemPrototype::fuel_category was removed. Please use ItemPrototype::fuel_categories.
Modifications: Modular Trains

Mods enabled - Modular Trains

Thanks for the report. The new version should fix it.

Die Mod Modular Trains (2.1.2) hat einen Fehler verursacht, der nicht behoben werden kann.
Bitte informiere den Autor der Mod über diesen Fehler.

Error while running event modular-trains::on_player_driving_changed_state (ID 34)
LuaItemPrototype doesn't contain key fuel_category.
stack traceback:
[C]: in function 'index'
__modular-trains/scripts/replacer.lua:105: in function 'fuel_is_compatible'
modular-trains/scripts/replacer.lua:117: in function 'restore_burning_fuel'
modular-trains/scripts/replacer.lua:351: in function 'replace_locomotive_procedure'
modular-trains/scripts/replacer.lua:376: in function 'replace_locomotive'
modular-trains/control.lua:52: in function 'switch_locomotive_type'
modular-trains/control.lua:130: in function <modular-trains/control.lua:122>

I didn't check the scripts directory last time. I uploaded a new version to fix it.