nRF Connect v3.6.1 - Toolchain Installation SEGGER Studio bug

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Im install nRF Connect SDK 1.5.1 trough nRF Connect 3.6.1 Desktop app to learn zephyr RTOS and switch from nrf5 SDK to it but there is some bug and "Configure nRF Connect SDK Project" option do not work:

It just open blank page(I use "blinky example") without errors... Any idea what to check?

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Today I have also another issue. I can't open any sample but now I get error "create_nordic_project.py failed (1)":

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Im found issue in nrf52840dk_nrf52840.dts file I had one mistake in spi1 configuration after removed changes it start working...