nrf Connect SDK Fundamentals Lesson 5 Excercise 1 doesn't work with thingy:53 and nRF5340-DK

Hello

I worked this example with nRF52840-DK kit it works very well. But, when i use thingy:53 with nRF5340-DK, I am not getting any ouput in puTTY screen. Even any example is not working with these 2 boards as i am using nRF52840-DK since start of the nRF connect SDK Fundamentals course it works evrything fine. But with thingy:53 with nRF5340-DK even i cannot see the simple hello world output. But the LED still blinks.

What would be the problem?

Regards

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