Hello, I am facing some errors when used CVX to optimize a convex problem below

where K and A is an operator of matrix that only support the formal data type in MATLAB, such as double, single, int8, uint8, int16, uint16, int32, uint32, and logical. However, The data type of variable x is cvx. The type of K, A and x in the workspace of MATLAB is shown as

The error I am facing is that

How can I use such operators in CVX? Any suggestion can be helpful.