Designer for Framework 7 in Eclispe 4.10 Not Save View

When create a view in Vaadin Designer for Framework 7 in Eclipse 4.10 and Save have this error.
17534378.png

Anyone have same error?

??

Hello Enrico,

support for Designer for Framework 7 ended. Regarding the error - I recommend you to use Eclipse Oxygen instead of 4.10, it looks like some internal Eclipse API has been changed.