I encountered this problem. How to solve it?

You can try the suggestion in the follwong article: https://adobe.ly/4gzPrxX

Let us know if that helps.

That might be that you need to run AE in Administrator mode.  I had that issue for ages when I upgraded my PC from then Win7 to Win10.  It was a known bug with Windows.

Alternatively, it might be as simple as trashing your preferences file:

https://community.adobe.com/t5/after-effects-discussions/faq-how-to-reset-trash-preferences-in-after-effects/td-p/10634342