England suffered an embarrassing 4-0 loss to Hungary in the UEFA Nations League earlier this week.
Reacting to the defeat, the Three Lions captain said: "We haven't had a camp like it for a long time.
"It's no time to panic, it's time to keep our heads up, look forward to a break now and come back strong in September.
"It was a night to forget but we've got to take it on the chin. We've got to move forward.
"We are preparing for a big World Cup and that's the most important thing. We'll learn a lot from this camp."
Manager Gareth Southgate, in particular, was criticised by fans after the underwhelming result.
Meanwhile, Kane's future is uncertain, as the striker continues to be linked with a transfer away from Tottenham.
Source: Be Soccer