Why I can't modify email autoresponder?

i try to modify email autoresponder in one new form...but the program doesn't give me the possibility

Unfortunately, I wasn't able to replicate the issue on my end. I can access the "Emails" wizard and edit the email alerts. Here's a screen capture:

I recommend you to log out from your account and restart your browser. Go back to your account and try it one more time.

May I know exactly what is happening when you click the "Edit" button of the autoresponder? Are you getting any error message? If you can provide a screenshot, please do so.

I have cleared your form cache so that your forms will be refreshed from our servers.

Hope that helps. Thank you.