II just recently got a new computer and wanted to download unreal engine but could not open any blueprints on these versions without it crashing. I uninstalled the engine, and even uninstalled the epic games launcher, but could not get it to work. Not only that, I cannot use any plugins on version 5.1.1 and it causes a crash if I try to open the window.
Hey there @Folairies! Welcome to the community! Could we take a look at the error? You can find it in the crash context that appears when the crash occurs, or you can find the general logs and crash logs in your saved/logs and saved/crashes folders in your project structure.
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Helpful video for general crashing:
