Sysbuild: Problem with DevAcademy Intemediate, Lesson 8, Exercise 1

I downloaded https://github.com/NordicDeveloperAcademy/ncs-inter/tree/main/v2.9.0-v2.7.0/l8/l8_e1 and tried to build it for nrf54l15dk/nrf54l15/cpuapp/ns . There are several warnings but no error. However VS code does not recognize build as successful. Pristine Build output is:

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* Executing task: nRF Connect: Generate config nrf54l15dk/nrf54l15/cpuapp/ns for sysbuild
Building sysbuild
C:\WINDOWS\system32\cmd.exe /d /s /c "west build --build-dir h:/nordic/sysbuild/build h:/nordic/sysbuild --pristine --board nrf54l15dk/nrf54l15/cpuapp/ns --sysbuild --cmake-only -- -DNCS_TOOLCHAIN_VERSION=NONE -DBOARD_ROOT=h:/nordic"
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

As I am unable to figure out, what is wrong, please advise me how to resolve the issue.