I have managed to get it to work.
Apparently there were problems with the nvs partition. I deleted all flash memory and rebuilt the partition table with a bigger offset.
Then after I reprogrammed the program everything worked.

I wrote an Arduino program that connects to a wifi network or creates an access point. To use flash encryption I compiled and flashed my program with the esp-idf and Arduino as component. With flash encryption disabled everything works as it should. However, now that I have flash encryption enabled,...

Hi, Ok, there is something I didn't understand. The pre-encryption image (.bin) for OTA uses a different key than the firmware encryption. It is clearer in my mind. Finally, I fixed some problems, I can update my firmware (encryption on and secure boot on) with OTA, with a .bin unencrypted. I will ...