Failed to load mods: Error while running setup for entity prototype "cerys-mixed-oxide-reactor" (reactor): next_upgrade target (5d-nuclear-reactor-02) must have the same fast_replaceable_group (nuclear-reactor != mixed-oxide-reactor).

Mods to be disabled:
Cerys-Moon-of-Fulgora
Wr_Enhanced_Map_Colors
Factorio_hd_age_base_game_logistics
Maraxsis

Any input on how to proceed?

We can probably look into adding a workaround for this bug inside 5dims, but should really be fixed on their end. Could you share your modlist so I can repro?

Hello, same here.

2.4.20 version of Cerys broke the compatibility

modlist:

"mods":
[

{
  "name": "base",
  "enabled": true
},

{
  "name": "elevated-rails",
  "enabled": true
},

{
  "name": "quality",
  "enabled": true
},

{
  "name": "space-age",
  "enabled": true
},

{
  "name": "2x2_Modular_Turrets",
  "enabled": true
},

{
  "name": "5dim_automation",
  "enabled": true
},

{
  "name": "5dim_battlefield",
  "enabled": false
},

{
  "name": "5dim_compatibility",
  "enabled": true
},

{
  "name": "5dim_core",
  "enabled": true
},

{
  "name": "5dim_enemies",
  "enabled": false
},

{
  "name": "5dim_energy",
  "enabled": true
},

{
  "name": "5dim_equipment",
  "enabled": true
},

{
  "name": "5dim_infiniteresearch",
  "enabled": true
},

{
  "name": "5dim_locale",
  "enabled": true
},

{
  "name": "5dim_logistic",
  "enabled": true
},

{
  "name": "5dim_mining",
  "enabled": false
},

{
  "name": "5dim_module",
  "enabled": true
},

{
  "name": "5dim_nuclear",
  "enabled": true
},

{
  "name": "5dim_resources",
  "enabled": true
},

{
  "name": "5dim_trains",
  "enabled": true
},

{
  "name": "5dim_transport",
  "enabled": true
},

{
  "name": "aai-loaders",
  "enabled": true
},

{
  "name": "Advanced-Electric-Revamped-v16",
  "enabled": true
},

{
  "name": "alien-biomes",
  "enabled": false
},

{
  "name": "alien-biomes-graphics",
  "enabled": true
},

{
  "name": "angelsinfiniteores",
  "enabled": false
},

{
  "name": "archie-inf-tech",
  "enabled": false
},

{
  "name": "BlackMarket2",
  "enabled": false
},

{
  "name": "bobinserters",
  "enabled": true
},

{
  "name": "bulkteleport",
  "enabled": false
},

{
  "name": "bulkteleport-balanced",
  "enabled": false
},

{
  "name": "bullet-trails",
  "enabled": false
},

{
  "name": "bzcarbon",
  "enabled": true
},

{
  "name": "bzlead",
  "enabled": true
},

{
  "name": "bzsilicon",
  "enabled": true
},

{
  "name": "bztin",
  "enabled": true
},

{
  "name": "bztitanium",
  "enabled": true
},

{
  "name": "bzzirconium",
  "enabled": true
},

{
  "name": "Cerys-Moon-of-Fulgora",
  "enabled": true
},

{
  "name": "chest-clearer",
  "enabled": true
},

{
  "name": "Cold_biters",
  "enabled": false
},

{
  "name": "Constructron-Continued",
  "enabled": true
},

{
  "name": "container-trader",
  "enabled": false
},

{
  "name": "creative-mod",
  "enabled": true
},

{
  "name": "CreativeItems",
  "enabled": false
},

{
  "name": "dark-matter-replicators-18",
  "enabled": false
},

{
  "name": "Dectorio",
  "enabled": true
},

{
  "name": "early_construction_modified_private",
  "enabled": false
},

{
  "name": "Explosive_biters",
  "enabled": false
},

{
  "name": "Extended-Laser-Turrets",
  "enabled": true
},

{
  "name": "factorioplus",
  "enabled": true
},

{
  "name": "factorissimo-2-notnotmelon",
  "enabled": true
},

{
  "name": "factorissimo-2-reforked",
  "enabled": false
},

{
  "name": "FactorySearch",
  "enabled": true
},

{
  "name": "far-reach",
  "enabled": true
},

{
  "name": "Fill4Me",
  "enabled": true
},

{
  "name": "Flare Stack",
  "enabled": true
},

{
  "name": "flib",
  "enabled": true
},

{
  "name": "FluidMustFlow",
  "enabled": true
},

{
  "name": "InfiniteInventory",
  "enabled": false
},

{
  "name": "infinity-invo",
  "enabled": true
},

{
  "name": "invincible-construction-bots",
  "enabled": true
},

{
  "name": "jalm",
  "enabled": true
},

{
  "name": "Krastorio2",
  "enabled": false
},

{
  "name": "Krastorio2Assets",
  "enabled": false
},

{
  "name": "krastorio2_extended_endgame",
  "enabled": false
},

{
  "name": "kry_stdlib",
  "enabled": true
},

{
  "name": "Kux-CoreLib",
  "enabled": true
},

{
  "name": "Kux-OrbitalIonCannon",
  "enabled": true
},

{
  "name": "Kux-SmartLinkedChests",
  "enabled": true
},

{
  "name": "laserfence",
  "enabled": false
},

{
  "name": "loaders-modernized",
  "enabled": false
},

{
  "name": "maraxsis",
  "enabled": true
},

{
  "name": "MegaBlackMarket",
  "enabled": false
},

{
  "name": "miniloader",
  "enabled": false
},

{
  "name": "Mining_Drones",
  "enabled": true
},

{
  "name": "Mining_Drones_Remastered",
  "enabled": false
},

{
  "name": "Moon_Logic_2",
  "enabled": true
},

{
  "name": "Nanobots2",
  "enabled": true
},

{
  "name": "PersonalTeleporter",
  "enabled": true
},

{
  "name": "PlanetsLib",
  "enabled": true
},

{
  "name": "plutonium-energy-k2-bz-compat",
  "enabled": false
},

{
  "name": "PlutoniumEnergy",
  "enabled": false
},

{
  "name": "prismatic-belts",
  "enabled": true
},

{
  "name": "prismatic-belts-space-age",
  "enabled": true
},

{
  "name": "qol_research",
  "enabled": true
},

{
  "name": "RampantArsenal",
  "enabled": false
},

{
  "name": "RampantFixed",
  "enabled": false
},

{
  "name": "RateCalculator",
  "enabled": true
},

{
  "name": "reverse-factory",
  "enabled": true
},

{
  "name": "robotarmy",
  "enabled": true
},

{
  "name": "rso-mod",
  "enabled": false
},

{
  "name": "scattergun_turret",
  "enabled": true
},

{
  "name": "SchallAutolinkedChest",
  "enabled": true
},

{
  "name": "SchallMachineScaling",
  "enabled": false
},

{
  "name": "SchallPipeScaling",
  "enabled": false
},

{
  "name": "SchallRecipeScalingBigRecipes",
  "enabled": false
},

{
  "name": "shield-projector",
  "enabled": true
},

{
  "name": "solar-productivity",
  "enabled": false
},

{
  "name": "SpidertronEnhancements",
  "enabled": true
},

{
  "name": "SpidertronPatrols",
  "enabled": true
},

{
  "name": "squeak-through-2",
  "enabled": true
},

{
  "name": "stdlib",
  "enabled": false
},

{
  "name": "stdlib2",
  "enabled": true
},

{
  "name": "Teleportation_Redux",
  "enabled": true
},

{
  "name": "Telogistics",
  "enabled": true
},

{
  "name": "ThickerLines",
  "enabled": true
},

{
  "name": "TogglePeacefulMode",
  "enabled": false
},

{
  "name": "Toxic_biters",
  "enabled": false
},

{
  "name": "transport-ring-teleporter",
  "enabled": true
},

{
  "name": "Transport_Drones_Meglinge_Fork",
  "enabled": true
},

{
  "name": "Trashcan",
  "enabled": true
},

{
  "name": "UltimateBelts",
  "enabled": false
},

{
  "name": "Unit_Control",
  "enabled": false
},

{
  "name": "visible-planets",
  "enabled": false
},

{
  "name": "VoidChestInstant",
  "enabled": true
},

{
  "name": "VoidChestPlus",
  "enabled": false
},

{
  "name": "Voidcraft",
  "enabled": true
},

{
  "name": "Waterfill_Fork",
  "enabled": false
},

{
  "name": "Waterfill_v17",
  "enabled": true

Hello, latest patch fixed the issue. Thanks a lot :). I appreciate it.