Project ported from UE 5.4.4 to UE 5.5.4 Crashes when saving player character

Development Programming & Scripting Blueprint
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1

Hey there. I ported my game project from UE 5.4.4 to 5.5.4, and for some reason, the engine crashes every time I try to save anything. I can edit everything in peace, I can even run the game if I fix all the bugs in blueprints. But I can’t save anything. The engine crashes even when I try to autosave. I’ve tried disabling third party plugins - it doesn’t help. I tried fixing all errors in blueprints first and then save - it doesn’t help. I tried making only 1 change and saving - the engine still crashes. I have absolutely 0 idea what this could be from.

Maybe someone has encountered something like this and found a solution? I can provide the necessary data, upon request. Thanks in advance for your help.

Update: project crashes, when I am trying to save player character blueprint. I’ve tried to reload asset, tried to delete whole logic in it, tried to make a duplicate and save it - none of it worked.

Error when crashing: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000050

I’ve tried to find this error, found out that it can be caused by graphics driver or GPU, so I updated driver for my rtx 2060, restarted PC, and error didn’t go away.

2

Fixed it. The problem was that I had a variable referring to the game’s save Blueprint. As it turned out, the save Blueprint itself also crashed because it had a structure of player settings. In this structure there was a variable that referred to Nvidia Image Scaling (NIS). Since on the new version of the engine I cut out NIS and DLSS completely, the variable related to this plugin became broken, and because of this it crashed all the logic related to it.

I’ll leave this thread, in case if someone will be stuck as me. Just search for broken variables in your project, after update of engine, and also make sure you installed all the plugins you were using on previous version.

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Yeah man, 5.5.4 made all my project run slow