ESP_ERR_NVS_NOT_FOUND while trying to open nvs partition after provisioning

[cesiumua]

Hi! I've been running a mqtt ssl_ds example app, which describes how to provision a device with certificate and key to be used for secure connection with MQTT. I'm able to provision a board, and it connects successfully to a secured MQTT broker, but, if I modify that example project to write some data to NVS storage, I'm always getting an error 0x1102 (ESP_ERR_NVS_NOT_FOUND).
I see this fail while trying to open a storage:

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err = nvs_open("storage", NVS_READONLY, &nvs_handle);

. I've seen somewhere that this error could be due to storage was not initialized, but if I change

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NVS_READONLY

to

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NVS_READWRITE

in

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nvs_open

function, seems like it erases previously provisioned certificate/key, as I'm getting an error that they could not be loaded during MQTT connection process.
The example comes with partitions.csv:

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# ESP-IDF Partition Table
# Name, Type, SubType, Offset, Size, Flags
esp_secure_cert,0x3F,,,0x2000,
nvs,data,nvs,,24K,
phy_init,data,phy,,4K,
factory,app,factory,0x20000,1M,

but I can't figure out, if some modifications are required here or not, in order to make nvs_open to work
So, how could I fix this error?
Thanks in advance!

[RathiSonika]

Hi, the issue isn't fully clear based on the current description. Could you please share your custom or modified code to help us better understand the issue?