Ultimate Belts updated to 1.1, work around until the original mod gets updated.
Original mod: https://mods.factorio.com/mod/UltimateBelts
This mod adds an additional five tiers of belts to the game, beyond what is currently available from other mods. The fastest belt in this mod is equivalent to 6 express belts.
Mods introducing new content into the game.
Ultimate Belts updated to 1.1, work around until the original mod gets updated.
Original mod: https://mods.factorio.com/mod/UltimateBelts