One of the reasons for crashes when creating Java mods is

It's "improper use of loops". In MCreator, you might find a "While do" block in the flow control category. This loop should generally not be used in triggers that "run every tick (0.05 seconds)". If the condition is true, the loop will restart every 0.05 seconds, and this state will stack as long as the condition remains true. In other words, the game crashes due to an overwhelming amount of repetitive tasks. This situation can occur not only in mod creation tools like MCreator but also when coding directly. (The principle of MCreator is "generating code based on the blocks I've placed"..) If you know "Jujutsu Kaisen", you'll understand this quickly. Please don't cast "Infinite Void" on your computer. You are not Gojo Satoru..