Firstly, we apologize for this inconvenience may have caused to your store.
At the moment, with the new display of AliExpress, you cannot import reviews normally for your products, here is our solution for you
Please help me to login to Ali Express with your Google/Facebook Account as a new AliExpress account to get the old display so you can simply import the reviews.
You can simply use Ali Orders to import product, then use Bulk Import in Ali Orders to import reviews since it’ll be worked with the old display of AliExpress.
Logout your Ali Express account > And importing without the account logged in then it should be fine as well.
We are checking and fixing this issue asap since AliExpress has changed their new display one more time, once again, really appreciate for your kindness in advance!
Please get back to us if you need some more help.