Simply put, when you encounter this Fallout problem, it denotes that your Fallout 4 Script Extender happens to error because of various factors related to the game and your PC. In some cases, some users may stumble upon Fallout 4 black screen due to the F4SE not working error. To be specific, Fallout 4 Script Extender doesn’t work or won’t launch. However, recent days have witnessed a frequent F4SE issue. And for Fallout gamers, needless to say, this functionality is necessary for game scripts. Besides, F4SE is an application that usually works like a community for Fallout gamers to extend the time of scripts. Just as you can see from its name, Fallout 4 Script Extender, which can be shortened as F4SE or FOSE, is used to enhance Fallout’s capabilities of scripting. What is Fallout 4 Script Extender? What is the F4SE Issue?