Hello.Here is the answer to your question.

Hi there!

Thank you for getting in touch.

Does this happen with all templates?

Please delete the folder WebSite X5- Evolution you can find on path C:\Users\Admin\AppData\Local\Incomedia, download the program from the "Download" section of your account and please install it again. 

If you keep receiving this error message, please try again after having disabled your firewall and antivirus, and start the program as administrator. 

Thanks! Kind regards.