The camera no longer recognizes the lens.no iris and NA lense not yello anymore in menue. Please help Lens is DJI 18-28 mm

Hi there, sorry for the issue you encountered. Please check the steps below:
1. Power off the DJI Ronin 4D. Remove the DL lens and DL mount. Check whether the pins are damaged or not.
1) If there is any dirt, wipe it with anhydrous alcohol. Let it air dry. Mount it again for testing.
2) If any component is damaged or does not pop up after being pressed, please return the corresponding component for testing and repair.
2. Re-mount the DL lens and the DL mount. (After tightening the lens, rotate it in the reverse direction to the endpoint.) Then, restore DJI Ronin 4D to the factory settings to see if the issue improves;
3. Check whether there is another DL lens or another device that can be mounted with a DL lens (such as Zenmuse X7/Zenmuse P1) for alternate testing.
1) If there is no other lens or device to conduct testing, we recommend sending back all of the devices for testing.
2) If you can conduct the test, please perform alternate testing to check the malfunctioning component. Then, send the malfunctioning component back for testing.
Please click https://www.dji.com/service/repair to start an online repair case.

None of the above helped. The DL Mountis absolutely intact; I haven’t used it at all. The lens is new. It didn't work the first time I installed it. After reinstalling it several times it started working. When I took it off and put it back it no longer

i wonted purchase  new DJI DL and surprised that dl mount dasn't  exist for sell. what to do if it lost and broke?

i used this dl mount few times and looks like some problem on it. i am out of warranty now

I am having the same issue and fixes/updates?