エクスプレッション中クラッシュ（AE固まる）

That's strange! Does it happen in all the projects? Do you see any crash reports or error messages? Try the steps in the following article: https://community.adobe.com/t5/after-effects-discussions/how-to-troubleshoot-startup-issues-in-after-effects-using-the-startup-repair-options/td-p/13866327

Let us know how it goes. Moving this thread from Bugs to Discussions for troubleshooting.

Thanks,

Nishu