After Effect Roto Brush is not working

[동우22056177ts6u]

When using Roto Brush, only the first frame is available, and the After Effect turns off the moment you press the key to the next frame.
Please help me.

[nishu_kush]

Hi 동우22056177ts6u,

Sorry for your issue.

Do you see any error message or crash report when it crashes? What's the exact version of After Effects you're using? Also, what are your system specifications (CPU, GPU, RAM, OS version)?

We're here to help, just need more info.

Thanks,

Nishu