1. mods
Did you add new mods before starting the game? If yes: Remove them from your mod folder and try to start the game.
2. shader cache
Another solution can be to delete the shader cache of the LS22. You can find the folder here: This PC\Documents\My Games\FarmingSimulator2022 There you will find a folder called Shader Cache. Open this folder and delete its content.
3. too many mods
If you have too many mods in your mod folder, the game may take more time to start. On weaker systems, this can sometimes take 5 minutes or longer with many mods.
4. corrupted game files
Sometimes it can happen that game files are damaged by e.g. a faulty configuration of the operating system or something similar and the game doesn't start anymore because of that. To check this you can do the following steps:
Steam:
Right click on the LS22 in the Steam library, "Properties" -> "Local Files" -> "Check Game Files for Errors".
GIANTS / DVD version:
Hold down the left shift key and double click on the desktop shortcut of the LS22, then select "Check installation" under "Utilities".
If these steps do not help you, you can also contact the official Farming Simulator support: https://farming-simulator.com/support.php