What could be the issue with the right rear door of a Jetour X70 not locking?

I bought a Kia Sportage in 2010, and suddenly the right rear door won't open. What could be the reason? It's not the child lock issue. Also, the door handle feels loose when pulled.

X70 stalls, and after closing the car door, it can't be locked with the remote.

What do you think about the JETOUR X70?

How to choose between Jetour X70 Plus and Jetour X70 Pro?

What could be the issue with the right rear door of a Jetour X70 not locking?

Jetour X70

How can I get the side mirrors of a Jetour X70 to automatically fold when locking the car?

What brand are the tires on the Jetour X70 Plus?

The child lock on the right rear door of the 2014 V60 is not engaged, but the door cannot be opened from the inside, only from the outside. What could be the issue?

Hey JETOUR X70 owners, have you noticed that this car doesn't have front and rear radar?