data of other passengers

Hi,
I’m testing the wp-travel plugin. when on the “WP Travel Checkout” page I can not enter the data of the other passengers.
It allows me to enter only the data of the leading passenger.
Perhaps it is necessary that I purchase an extension?

I am attaching video screen shots so you can better understand the problem.
https://italianyes.it/WP-TRAVEL-TEST.mp4
can you help me?

Waiting for your answer
Greetings

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