Hello @Prosper_O ,
Thanks for your post. Perhaps you can directly download the FRDM-KL46 SDK from SDK Builder | MCUXpresso SDK Builder.

Then import the repository using the LOCAL ARCHIVE method, select "Import Repository -> LOCAL ARCHIVE -> Archive -> Browse", then locate the SDK folder downloaded via SDK Builder and select the built SDK_2_4_1_frdm-kl46.

Create a new empty folder named "frdm-kl46", click "Destination -> Browse" to select the newly created folder, and then click "Import" to automatically import the SDK.
After that, the board should be recognized normally when importing the project.
Hope it can help you.
BRs,
Celeste
-------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the "ACCEPT AS SOLUTION" button. Thank you!
-------------------------------------------------------------------------------------------------------------------