My editing program keeps crashing and I don't know why

Hey all, I have been using the free version of capcut on my PC and made some videos with them. My videos are about 5-13 minutes long and are somewhat "heavy edited" (I am a PNG tuber so I use a lot of pictures). During editing the Programm runs totally fine and I couldn't be happier.

Here is my problem: As soon as I want to exporty capcut almost always crashes. Just by clicking the export button nothing works anymore. In the export menu you can change a lot of things, but I can not access any of these. I believe that there is about 150gb of space on my c drive (heard that could be a problem)

It has just made me very nervous starting a new project, spending tens of hours just to not be able to export my work