Questions: External Flash required for Matter?

Hello.

I am trying to use nRF Connect SDK v2.8.0 and nRF52840 to run Matter's Light Switch and Light Bulb.

I was able to confirm that it works with nRF52840-DK, but it doesn't seem to work with nRF52840 evaluation boards that do not have an external Flash.

It worked with nRF Connect SDK v2.6.1.

If I use nRF Connect SDK v2.8.0, is it possible to run it with just the internal Flash?

I tried writing

CONFIG_CHIP_QSPI_NOR=n
CONFIG_CHIP_OTA_REQUESTOR=n
CONFIG_SIZE_OPTIMIZATION=y

in prj.conf, but it didn't work.

Best regards.

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