Dino_201

Empeze a jugar en un server con mods(solo 1)en la 1.12.2 y al entrar me aparece este error(no me deja sacarle captura): forge mod loader detected missing/unknown registrie(s) there are 1 missing registries in this save. if you continue the missing registries will get removed. this may cause issues, it is advised that you create a world backup before continuing missing registries: minecraft:dataserializers