Hi José good morning,
Can you give more details of your environment?
I successfully installed the component in another Personal environment, Version 11.8.0 (Build 12006) the same version that I used for development, but it gave me this error when I tryed in a Enterprise environment Version 11.7.3 (Build 7036) and Version 11.7.0 (Build 4761).
I will investigate this and open a ticket with Outsystems, it may be some compatibility issue with some resource, based on the message it seems that is a problem with the widget preview.
Best regards,
Leandro Oliveira