VS Code cannot recognize the SDK and toolchain

[joey]

HI

I'm having an issue where VS Code cannot recognize the SDK and toolchain. Everything was working fine before, but now errors occur when I open VS Code and try to build the project directly, as shown in the picture. How can I fix this?

I have already tried the following:

1. Reinstalled the SDK and toolchain.
2. Uninstalled the Nordic extensions from the hidden folder in the root directory of the C drive.
3. nrfutil cannot recognize the SDK version.
4. Set the ZEPHYR_BASE environment variable.

But the problem still persists.

Thanks!

[Turbo J]

Try downgrading the nrf connect extension to 2026.1.1327 version.

Note that ZEPYHR_BASE sounds like a terrible idea when using vs code plugin - it should be handled internally AFAIK and point to the selected NCS SDK for a project when compiling/running tools.

[joey]

• How do I downgrade it?
• Yes, I think ZEPHYR_BASE should be set automatically. Otherwise, having different configurations for different SDKs is very inconvenient.