Hello,
Was the installation of Execview successful?
Is the ECM service installed on Media Server?
When no, please push install it on the Media Server because if you dont have that service installed on Media server you wont be able to servers added in the program.
When the warning window pops up, choose the always trust content from this publisher option and click Run.
This will cause the browser to freeze.
Press control alt delete and then click the Task Manager button.
End the task 'Execview' and restart the Execview services
Now try to open the application.
Let us know if this helps.
Thank you,
Shweta