When loading the game on the latest version the game crashes with this error (not loading a save game, loading the main menu):

Failed to load mods: Error while loading entity prototype "cube-local-turbine-source" (electric-pole): Key "direction_count" not found in property tree at ROOT.electric-pole.cube-local-turbine-source.pictures
Modifications: Ultracube: Age of Cube

Mods to be disabled:
Ultracube (0.4.6)

I don't know how to copy the list of mods here so i will post them once i know.

This is an incompatibility with some other mod you are running, I've seen it reported before (can't remember which one, though).

All mods written out INDIVIDUALLY:
- AAI Loaders
- AAI Signal Transmission
- Base Mod
- Crafting Combinator
- Early Armor Grid
- Early Robots
- Equipment Gantry
- Factorio Library
- Factorissimo 2
- Far Reach
- Faster Hand Mining Tech
- Faster Robots
- Fireproof Bots
- FNEI
- Ghost Scanner2
- K2 Assets
- Milestones
- Mining Patch Planner
- Module Inserter Simplified
- Nixie Tubes
- Pushbutton
- Recursive Blueprints
- Remote Configuration
- Robot Replacer
- Rusty's Locale Utilities
- Simulation Helper
- Spidertron Helper
- Teleporters
- Text Plates
- Time Speed
- Train Upgrader
- Train Speed Plus
- Ultracube: Age of Cube

I never expect an Overhaul mod to work with another Overhaul mod, so i never have more than one enabled.

I should have looked at the log BEFORE posting the above:
2.490 Script @aai-loaders/data.lua:5: Log mods once: {
["Early-Armor-Grid"] = "0.0.3",
FNEI = "0.4.2",
Factorissimo2 = "2.5.3",
GhostScanner2 = "2.0.3",
Krastorio2Assets = "1.2.2",
Milestones = "1.3.23",
ModuleInserterSimplified = "1.1.4",
RemoteConfiguration = "1.2.5",
SpidertronEnhancements = "1.9.1",
Teleporters = "1.0.5",
TrainSpeedPlus = "1.0.3",
Ultracube = "0.4.6",
["aai-loaders"] = "0.1.4",
["aai-signal-transmission"] = "0.4.9",
base = "1.1.104",
botReplacer = "1.1.2",
crafting_combinator = "0.16.3",
["early-robots"] = "0.1.2",
["equipment-gantry"] = "0.1.5",
["far-reach"] = "1.1.3",
["faster-handmining"] = "2020.12.7",
["faster-robots"] = "0.0.3",
["fireproof-bots"] = "1.1.3",
flib = "0.13.0",
["mining-patch-planner"] = "1.5.8",
["nixie-tubes"] = "1.1.4",
pushbutton = "1.1.1",
["recursive-blueprints"] = "1.2.7",
["rusty-locale"] = "1.0.16",
simhelper = "1.1.6",
textplates = "0.6.10",
timeSpeed = "0.2.2",
["train-upgrader"] = "1.0.5"
}
AAI Loaders prints all enabled mods and their versions to the log file...

Try disabling and reenabling mods until it works.

I've been in situations like this...