Hi Jyoti,
A few options you can try
- Retry the installation at a different location
- Confirm that the installer was downloaded successfully and there is no problem with the installer itself. (re download if necessary
- Check if the OS you are installing is supported. - System Requirements
There is a question webMethod 10.11 Free Trial Version - #9 by Kumar_Saurav2 where installation on Windows 11 had the same problem. - When the error occurs, you can check if there is a stacktrace.
-NP