No firmware found for file

[icondev]

I am having trouble updating a product with the firmware update file using NRFconnect app for ios version 2.5.3 using iphone se 2020.

We have been running successful updates for 7 years on the nRF51822.

I have used NRF apps in the past to update products. Several days ago our product was failing to update using our custom app. When this happened I decided to try with the NRFconnect app and I got this error (see attached image).

Please let me know what causes the error.

What other information do you need to diagnose this problem?

Thanks

[Edvin]

Hello,

Does this issue only occur on that particular iPhone model? 

Can you please show me how you generate the image using nrfutil, and how did you transfer the image to the phone?

Does the update work if you transfer it using nRF Connect for Desktop -> Bluetooth Low Energy (for debugging purposes.

If you try to generate and upload an image for the nRF52 series to your phone, obviously it wouldn't work, as it will not fit the target, but does it give the same error message?

Best regards,

Edvin