Somebody help with error on Tlauncher

So some friends and i were going to play a modded server and my friends could enter but i couldnt enter the game as soon as i clicked the yellow button on the launcher "Enter the Game" the red loading screen apears for some seconds and then some error occurs and it closes a message on the error tells me to try and delete or desactivate some mods to see if any of those haves a problem but even if i just create a modded folder and don't put any mod it still happens can somebody help me?

Yes i would if i could but im not even 16 years old so i dont have money nor somehow to pay

Anyways how do you close a thread because i already fixed the error