Hi Junfeng,
When use MQX_KSDK, it needn't add the mqx_ksdk component, we only need choose here :

this function is equivalent to MQX_KSDK. There are all the OS the KSDK concluded, we can refer to our need select.
And I test only use the mqx_ksdk component, it show this error below :

So, please do as i said.
Another point, if there are more than one clock under "Clock configuration", please click the "-" to only one.
like this :

Best Regards,
Alice
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