Hi Abhi,
This issue occurred when we removed the Installer registry entry from Package Cache location by manually. To resolved this issue, follow the below steps.
1. Download the “Windows Installer Cleanup” utility from the following link.
2. Install this msicuu2.exe with "Admin Privileges".
3. After installing the utility, open the Windows Installer Clean Up from the Start menu. Select the version of the Syncfusion Essential Studio (Ex: v15.3.0.26) that you need to uninstall and click Remove from the Windows Installer Clean Up window.
4. Now registry entry and cached files of selected Syncfusion Essential Studio version will be removed from your system.
5.Remove the Syncfusion Essential Studio setup installed folder from the installed location.
Location:
{Installed location\Syncfusion\Essential Studio\{version}}
Example:
{C:\Program Files (x86)\Syncfusion\Essential Studio\15.3.0.26}
Please let us know if you need any further assistance.
Regards,
Kalap Johnson Peter P.