(Sorry, I don't speak English, I use a translator.
this is a translation into the text of the screenshot with an error, since I do not know how to attach the screenshot itself.)

Mod Loading Error

Failed to load the following mods:
G-thermal, _/data-updates/thermal-interface-generated/aka216-
to index local 'machine_box' (a m'value)

Stack traceback:
G-thermal, /data-updates/thermal-interface-generated/aka216- in function 'calculate_machine_footprint'
G-thermal, /data-updates/thermal-interface-generated/aka311- in function 'calculate_specific_heat'
G-thermal, /data-updates/thermal-interface-generated/aka318- in function 'generate_thermal_interface'
G-thermal, /data-updates/thermal-interface-generated/aka528- in function 'generate_thermal_interfaces'
G-thermal, /data-updates/thermal-interface-generated/aka540- main chunk
[G] in function 'require'
TFMG-thermal, /data-updates/aka1- main chunk

Mods to disable:

· TFMG-thermal (0.4.10) ■ Reset mod settings

What mods do you have?

Also, in future, don't translate errors popups. It may seem like a good idea, but the translator mangles important text, making it harder for me to figure out what went wrong.

I need to be able to recreate the error, or I won't be able to fix it.

Regardless, I've added a sanity check to give a special error for when this occurs. This is not a TFMG thermal issue, but the issue of whatever mod is adding the thermal system to an entity without a collision box.

list of mods (список модов) :

· Alternative Areas
· Any Planet Start 1.1.22
· Atomic Robots Fix-Fix-Boost 4.0.1
· Auto Decoratract 1.0.10
· Barreling Group 0.5.0
· Belt Visualizer 2.0.2
· Better miners 3.0.0
· Better StarMap Background 2.1.3
· Big heat Furnace 0.0.5
· Bigger Barrel Stacks 2.0 1.0.0
· Blueprint Manipulation Library 1.1.6
· Brompuff Agriculture 1.1.0
· Bricked Foundry 1.1.2
· Burner still 0.0.3
· Calculator UI 2.0.1
· Canal Excavator 1.5.1
· Canal Excavator Graphics 1.3.0
· Carnow/Shotgun HR Asteroid 1.0.0
· Cargo bay inserters 1.0.4
· Cargo Ships 1.0.27
· Cargo Ships Graphics 1.0.4
· Carriage Transport 0.1.1
· Chemical Roblets 0.1.0
· Circuit Visualizer 2.0.2
· Качество (Quality) 2.0.72
· Название рельсы (Name rails) 2.0.72
· Space Age 2.0.72
· Заряжаемые аккумуляторы (Battery Powers) 2.0.72
· На морях пути [Trad By Fr_Dae] 2.0.4
· Паровая турбина на Вулкане 0.8.5
· Планеты видны в космосе 1.0.0
· Пушечная турель 1.5.7
· Корунд (Corundum) 2.4.2
· Vesta 1.0.43
· Мулуна, луна Наувиса 2.0.29
· ААП передача сигналов 2.1.69
· ААП Согласная & Waterhouses 0.5.3
· ААП Vehicles: Ironclad 0.3.2
· Actual Underground Pipes 0.7.5
· Advanced Spaceship Repair 1.0.3
· Agricultural Tower Extended Controls 1.0.7
· Alert Scanner 0.1.2
· Alien Biomes Graphics 0.2.2
· All the Landing Pads 0.7.1
· Alternative Steam 1.0.0
· Amy Planet Start 1.4.0
· Any Planet Start 1.1.22
· Circuit Visualizer 2.0.2
· Circuit Wire Eraser 1.1.0
· Color Coded Pipes no extra pipes 1.4.3
· Color whole train 2.1.0
· colorful_biochember 1.1.4
· Copper construction robots 0.1.2
· Crash Site 2.1.3
· Debloat: Mine cliffs by hand 1.2.1
· Disco Science 2.0.1
· Dredgeworks 0.8.13
· Dredgeworks Graphics 0.1.1
· Dredgeworks-Frozen Reaches 0.3.6
· Early Elevated rails 0.0.3
· Early Heating 1.1.3
· Electric Heating Tower 0.3.0
· Electric Trains 2.0 0.4.2
· Electromagnetic Plant Expanded 1.0.1
· Elevated pipes 1.4.5
· Energy Combinator 1.1.1
· Enhanced Shadows 1.0.4
· Equipment Gantry 0.2.4
· Factorio crash site 2.0.6
· Factorio Library (Endomorreva Factorio) 0.16.5
· Helmod Assistant for planning your factory
· Hypercell substation
· Induction Charging Revamp
· Inventory Sensor
· IPL - Inter Platform Logistics
· Krastorio Biofuel
· Kryzeth Standard Library
· Lane Splitters
· Lawn Mower
· Lightning collector equipment
· logging for factories
· MART Thrusters
· Modern Bulk Rail Loader
· Molten plastic
· Molten Tungsten
· More Barrels
· More Quality Scaling
· Muluna Graphics
· Muluna Utility Constants
· Niry's Foundry Ammo
· No Pipe Touching 2.0
· Nuclear Science
· Ocean Dumping
· Factorio Library (Endoworrea Factorio) 0.16.5
· Fast Hand Craft 1.2.0
· Filter Chests 1.2.0
· Finely Crafted Graphics 1.1.0
· Fission Transfer 1.0.1
· Fluid recycler 1.0.3
· Fluroflux-Stingfroid Agriculture 1.0.2
· Foundry Expanded 1.0.0
· Fusion Robots 1.0.3
· Gas Furnace 0.2.5
· Gables All the Agriculture 0.0.3
· gbaba_culture4_soil 1.0.4
· Glowing Laser Beams 0.0.5
· greener_artificial_yurnako_soil 1.0.0
· Gun Equipment 0.0.22
· Gun range visualiser 0.1.1
· Heat Furnace 0.2.2
· Heat Inserter 1.2.3
· Heat management 1.0.0
· Heat Processing 0.3.9
· Heat Pumps 1.0.8
· Heat Sensor 0.1.1
· Helmod Assistant for planning your factory 2.2.8
· Set Default Import Planet 1.0.0
· Simple Configurable Inserters [A] 2.2.3
· Simple Gauge 1.0.0
· Slipstack Agriculture 1.1.0
· Solar Array Wings 1.0.2
· Solar Ratio Calculator 0.0.3
· Space Exploration Graphics Part 1 0.7.5
· Space Exploration Graphics Part 4 0.7.2
· Spoilage Scanner 0.3.4
· Spoilage solution 1.0.0
· Stirling Generator 0.1.0
· Strategy Mortar Turret 1.2.0
· Sulfur 0.1.0
· Superheating 1.1.2
· Sushi Splitters 0.1.5
· Switch Button updated for 2.0 0.2.3
· Text Plates 0.7.2
· TFMG Thermal Library 0.4.10
· Thermal Solar Power (Lite) 2.1.16
· Tile Upgrade Planner (Muluna Fork) 1.0.6
· Time Control Fork 2.0.46
· Turbines ++ Reloaded 2.1.12
· UPS-Friendly Music Tubes 0.3.0
· YANGKEN PLANETARY 0.7.0
· Ocean Dumping 0.1.3
· Offshore dump 1.0.0
· Pentapod Biolabs 1.0.7
· Planet Vesta assets 1.0.0
· Planet Vesta assets pack 2 1.14.7
· Planetstab 1.0.0
· Plasma Dust 1.0.4
· Plasma Industries 1.0.4
· Plastic Burns 1.0.0
· Plutonium Energy 1.8.0
· Poison Immunity for Asteroids 0.1.0
· Pump with adjustable flow rate 1.0.0
· Quality holmium ore returns more holmium solution 1.2.1
· Quality Seeds 1.3.0
· Rail Support Energy Transfer 0.1.0
· Read belt contents, hold (all belts), read belt length 1.1.1
· Recipe Combinator 0.1.11
· Recursive Blueprints+ 1.4.9
· Recycling in Factomopedia 0.10.0
· Rocky Asteroids 0.1.1
· Schall Oil Fuel 2.0.0
· See Through Rails 1.1.0
· Set Default Import Planet 1.0.0
· UPS Friendly Mute Tubes 0.3.0
· VehicleSnap 2.1.0
· Vidrams Lava Power 2.0.2
· Water Freezing 1.0.2
· Water Roofs 1.0.0
· Wind Turbines (relaunched) 2.2.1
· Zitholian’s Extra Storage Tanks for 2.0 1.0.5

I've checked these mods, and the game starts with them
(я проверил эти моды, с ними игра запускается):

· Big heat Furnace
· Early Heating
· Electric Heating Tower
· Heat Furnace
· Heat Inserter
· Heat management
· Heat Processing
· Heat Pumps
· Heat Sensor
· Superheating
· Thermal Solar Power (Lite)
· Turbines ++ Reloaded

off topic, but I've checked the compatibility of these mods with yours. I found 3 problems:
heat furnace and big heat furnace break down at temperatures lower than their working temperature.
The heat pump breaks down from the heat, which doesn't seem logical.

(не по теме, но я проверил совместимость этих модов с вашим. нашел 3 проблемы:
heat furnace и big heat furnace ломаются при температуре меньшей чем их рабочая.
heat pump ломается от тепла, что кажется не логичным.)

There have also been observed game freezes related to your mods. I checked through F4 show-time-usage and sometimes the average mc/tick reached 2 and the maximum 11.

(ещё были замечены зависания игры связанные с вашим модов. я проверял через F4 show-time-usage и иногда среднее mc/tick достигала 2 а максимальная 11.)

given the update to the error system, I thought that receiving an error message when trying to run a complete mod build might be useful to you, here is a new error message without translation.:
(с учётом обновления системы выдачи ошибок я подумал что получение сообщения ошибки при попытке запуска полной сборки модов может быть вам полезной, вот новое сообщение об ошибке без перевода:)

Ошибка загрузки модов

Не удалось загрузить следующие моды: „G-thermal_“/data-updates/thermal-interface-generated.lua:215: attempt to concatenate local 'machine' (a table value)
stack traceback:
„G-thermal_“/data-updates/thermal-interface-generated.lua:215: in function ‘calculate_machine_footprint’
„G-thermal_“/data-updates/thermal-interface-generated.lua:312: in function ‘calculate_specific_heat’
„G-thermal_“/data-updates/thermal-interface-generated.lua:319: in function ‘generate_thermal_interface’
„G-thermal_“/data-updates/thermal-interface-generated.lua:528: in function ‘generate_thermal_interfaces’
„G-thermal_“/data-updates/thermal-interface-generated.lua:541: in main chunk
[C]: in function ‘require’
„...TFMG-thermal_“/data-updates.lua:1: in main chunk

Мода для отключения:

• TFMG-thermal (0.4.11)
• Сбросить настройки мода

given the update to the error system, I thought that receiving an error message when trying to run a complete mod build might be useful to you, here is a new error message without translation.:
(с учётом обновления системы выдачи ошибок я подумал что получение сообщения ошибки при попытке запуска полной сборки модов может быть вам полезной, вот новое сообщение об ошибке без перевода:)

Ошибка загрузки модов

Не удалось загрузить следующие моды: „G-thermal_“/data-updates/thermal-interface-generated.lua:215: attempt to concatenate local 'machine' (a table value)
stack traceback:
„G-thermal_“/data-updates/thermal-interface-generated.lua:215: in function ‘calculate_machine_footprint’
„G-thermal_“/data-updates/thermal-interface-generated.lua:312: in function ‘calculate_specific_heat’
„G-thermal_“/data-updates/thermal-interface-generated.lua:319: in function ‘generate_thermal_interface’
„G-thermal_“/data-updates/thermal-interface-generated.lua:528: in function ‘generate_thermal_interfaces’
„G-thermal_“/data-updates/thermal-interface-generated.lua:541: in main chunk
[C]: in function ‘require’
„...TFMG-thermal_“/data-updates.lua:1: in main chunk

Мода для отключения:

• TFMG-thermal (0.4.11)
• Сбросить настройки мода

Seems i made a slight mistake with the error logging function. i just fixed that. but like, my input is that these issues arent TFMG-thermals fault, theyre the fault of heat management, blindly adding thermal interfaces to machines that shouldnt have them.

off topic, but I've checked the compatibility of these mods with yours. I found 3 problems:
heat furnace and big heat furnace break down at temperatures lower than their working temperature.
The heat pump breaks down from the heat, which doesn't seem logical.

(не по теме, но я проверил совместимость этих модов с вашим. нашел 3 проблемы:
heat furnace и big heat furnace ломаются при температуре меньшей чем их рабочая.
heat pump ломается от тепла, что кажется не логичным.)

There have also been observed game freezes related to your mods. I checked through F4 show-time-usage and sometimes the average mc/tick reached 2 and the maximum 11.

(ещё были замечены зависания игры связанные с вашим модов. я проверял через F4 show-time-usage и иногда среднее mc/tick достигала 2 а максимальная 11.)

Im willing to bet thats a symptom of the very large modlist you've got. Each individual type of machine will add more work for the thermal system to do, making the game run gradually slower. I am working on improvements, but the thermal system is inherently hard to optimise.

Im willing to bet thats a symptom of the very large modlist you've got. Each individual type of machine will add more work for the thermal system to do, making the game run gradually slower. I am working on improvements, but the thermal system is inherently hard to optimise.

these delays were received when launching the game only with those mods that I checked for compatibility:
(эти задержки были получены при запуске игры только с теми модами что я проверял на совместимость:)

· Big heat Furnace
· Early Heating
· Electric Heating Tower
· Heat Furnace
· Heat Inserter
· Heat management
· Heat Processing
· Heat Pumps
· Heat Sensor
· Superheating
· Thermal Solar Power (Lite)
· Turbines ++ Reloaded

but even when playing only with your mod and Heat managment, freezes were also observed.
(но и при игре только с вашим модом и Heat managment зависания тоже наблюдались)

Seems i made a slight mistake with the error logging function. i just fixed that. but like, my input is that these issues arent TFMG-thermals fault, theyre the fault of heat management, blindly adding thermal interfaces to machines that shouldnt have them.

in any case, information about the mod causing the error will be useful, if not to ensure compatibility, then to add it to the list of incompatible mods.
I will try to find the problematic mod and let you know.
(в любом случае информация о моде вызывающем ошибку будет полезна, если не для обеспечения совместимости то для внесения в список не совместимых модов.
я постараюсь найти проблемный мод и сообщить вам.)

I think I found a problematic mod, it's Recipe Combinator.
(кажется я нашёл проблемный мод, это Recipe Combinator.)

I think I found a problematic mod, it's Recipe Combinator.
(кажется я нашёл проблемный мод, это Recipe Combinator.)

Thank you. Let the creator of heat management know, so they can exclude that mod from their script. That way both mods should run.

As for performance issues, I can only try to make improvements, I haven’t observed an issue. But I will try to investigate things.