Click won't work

[Blynk_Coeur]

Sometimes it is not possible to validate the edited dashboard

[Pavel]

Browser, OS?

[Blynk_Coeur]

Windows10 , Firefox, I can try with Edge.

[aleksey-10]

Do you have any messages at the top of your screen, like this?

[Blynk_Coeur]

Not the same message, that tells me I have been disconnected
I think there is a time out because that issue happened only when I leave my editor opened for a while without saving