To explore this problem, I have downloaded the KW41z SDK from the SDK builder and imported the example 'frdmkw41z_wireless_examples_hybrid_ble_thread_router_wireless_uart_freertos'. I see this build without error in MCUXpresso IDE 10.0.2 build 411.
Now there have been changes made to this SDK, so please can I ask you to do the following to ensure you are using the latest SDK for this part.
1 - from within MCUXpresso IDE, select the installed SDK tab. Right click on the SDK_2x_FRDM-KW41z entry and select Delete SDK
2 - go to the the SDK builder page at:
Welcome to MCUXpresso | MCUXpresso Config Tools
From here go to Manage -> Manage Existing Configurations and ensure that there is no KW41 SDK present in your list of configurations. If one is present, please delete the entry.
Then request a new SDK build of the KW41 SDK and install that into MCUXpresso IDE 10.0.2 and import and build the above example. I believe you will see this build without error.
Yours,
MCUXpresso IDE support