No camera view on DJI AIR

I don’t have camera view in Litchi, all other functions are OK (in DJI GO4 I have camera view ) Any good advice, please?

Make sure you close ALL background apps before starting Litchi, this also includes DJI GO 4.
Make sure only 1 USB-port on your controller is occupied (either micro-USB or USB-A).

Thank you for your answer. I try it again. iPhone XS.

Litchi for iOS is not yet compatible with Mini 2, Mini SE and Air 2S as DJI did not release an update for the iOS SDK yet. DJI plans to release the update on 31st March 2022. Litchi’s iOS beta will be updated shortly after.

Checked latest firmware, erased and newly record app Litchi. Restarted iPhone. Camera is working, I made some pictures and clips from Litchi app, but live view is not visible, screen is black. I have DJI Mavic AIR and iPhone XS.
Any other advice? Thanks in advance.

Try another USB-cable.