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tModLoader

The official server for tModLoader, an API to mod Terraria. Collaborate and find the latest TML news!

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Game taking an abnormally long time to launch.

So I've just launched the game (which was fine just a few days ago, launching in around 30 seconds) and it is taking over 10 minutes just to launch from the cmd window. Anybody else having this issue or had it and know how to fix it?...

Invalid program, cannot play/load into calamity world

Prompts with this issue, Tried uninstalling reinstalling mods and tmod loader, same issue, didnt have this problem til after the latest tmodloader update.
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Please help guys

Recently, this error started appearing after I copied a structure using the DragonLens mod and try to enter any other of my worlds
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Which mod is this structure from?

This structure is overlapping another one which causes my spawnpoint to be out of place. I need to know which mod this structure from, so I can remove it. Help very appreciated 🙏
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When starting Linux server workshop mods are not loaded

I have tried searching for a similar issue to see if it helps with my issue, but have been unsuccessful - I am running the server using the manage-tModLoaderServer.sh script - I have an enabled.json and a install.txt file in my ~/Mods folder - my serverconfig.txt files correctly points to the ~/Mods and ~/Worlds folders...

Tmodloader will either not launch or take forever to launch

here are the launch logs Logging to C:/Program Files (x86)/Steam/steamapps/common/tModLoader/tModLoader-Logs/Launch.log Fixing Environment Issues mv: can't rename 'C:/Program Files (x86)/Steam/steamapps/common/tModLoader/Libraries/Steamworks.NET': Invalid argument...

Is there a way to force load an outdated mod

I was mid calamity wrath of the gods playthrough with my friend and then tmod updated and the wrath of the gods multiplayer fix mod became outdated thus rendering our playthrough unplayable, is there any way to force load the mod or just anything I can do at all?

cant even play calamity

hello i already uninstall tmod and i cant even play singleplayer with calamity mod alr try to change game version, someeone could help?

Syncing mods Issue even with no mods at all

so a few days ago me and my friend joined each other fine but now we are having issues joining each other with it saying "Syncing Mods" so we tried singling out which mod is doing it and nothing worked and even with no mods installed it says the same thing

game closes on world creation

basically what it says on the tin. At the very last moment before world generation completes, the game freezes and closes without an error message.

game randomly starts flickering

when i try to hold ESC or literlly any keybind the game stops, cant attack cant anything. the bug is in multiplayer and singleplayer

My tmodloader takes like almost 10 minutes to even start the game (NOT loading mods)

It takes too long to load and also crashes after i enter the game or try to access a world

Music Volume keeps resetting to 0%

If I set the music volume to something over 0, after a few seconds to minutes it will reset to 0. The time that it takes is pretty unpredictable but seems to get shorter the longer I play. I unfortunately do not have a log available bc I havent played in a long time because of this issue. Has anyone else experienced this? is it a known issue?

New headset not loading sounds for TMOD loader

I just got a new headset, the corsair hs80 max, and suddenly, tmodloader has no audio, but only with this headset. I tried my speakers, and old headset, and got audio, but when switching back audio devices in windows, there was no sound for the new headset. This is the only game this is happening with. Any help? I should also note it works fine in Vanilla terraria, just TMOD is having this issue.

2 of my friends cant join without crashing

I'm trying to play with 2 of my friends at once and only one of them can join, and if the second joins, then they both crash

Texture Issues

So, i had this problem for quite some time and it started getting annoying. I spawned skeletron prime and the stinkbugs in vanilla and they were normal, but for some reason in tmodloader their textures are broken. I disabled all mods and texture packs but the problem still not solved, i checked the integrity of both terraria and tmodloader and its still the same thing.
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Modpack works for my friend but not for me

Me and my friend found a 2024 modpack and tried it with preview version 2025.07. While i kept getting "Main engine crashes" and JITException errors it worked fine for my friend. after disabling some mods like quality of terraria and Infernum(and even more) it started to work but my question now is why does it work for him but not for me? Am i doing something wrong?

having some issues with the background of my worlds often not displayed correctly

the image is the worst its been as of late before it was just slightly off on the bottom and the right but it just looks like this now (its like this on all biomes and was like this before WOTG most noticable in hell) i should add main menu is perfectly fine...
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TML error

im having this error when i launch tml on steam i tried unsubbing to all my mods,verifying the files uninstalling both terraria and tml, turned off firewall i even manually added the mods folder and still nothing
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