fill in and sign. select sign. document closes, saves nothing reader crashes

Hi Anita

Hope you are doing well and sorry to hear about the issue you are experiencing. As described the Adobe Acrobat DC is crashing when you try to fill and sign the document yourself.

Would you mind sharing the version of the Adobe Acrobat Reader DC you are using? To check the version go to Help > About Acrobat and make sure you have the latest version 21.05.20048  installed Go to Help > Check for Updates and reboot the computer once

Please try to reset the Acrobat Preferences to default as described in the help page https://community.adobe.com/t5/acrobat/how-to-reset-acrobat-preference-settings-to-default/td-p/4792... and check

You may also try to turn off the protected mode for testing (Win Only) Go to Edit > Preferences > Enhanced Security > Uncheck 'Enable Protected mode at startup' Turn off the protected mode and Uncheck 'Enhanced Security' > Click OK and reboot the computer once.

Note: Please turn on the security after testing to avoid any security risk

If it still doesn't work, please create a new test user profile with full admin rights in Windows or enable the root account in Mac and try using the application there and check. 

You may also check the steps shared in the help pages below
- https://helpx.adobe.com/acrobat/kb/acrobat-dc-crashes-on-windows-os.html

- https://helpx.adobe.com/x-productkb/global/troubleshoot-system-errors-freezes-mac.html

Regards

Amal