Thumbnails are not updated and images cannot be exported.

Thumbnails are not updated and images cannot be exported.

Also, the 2d view is not updated even though the display output is pressed in the 2d view.
You can't even export images.
I tried reinstalling it and clicking Recreate Thumbnails, but it didn't work.

It's been working fine until now, and when I put together a heavier and more complicated node than this, it worked fine, so I don't think there's a problem with the computer's machine specs.
Please let me know if there is a solution.