Idiom request for foolishness

Question

Not knowing the root cause and doing something else without solving the actual problem.

Do we have an idiom/single word for the above sentence?

Answer 1

If the "something else" requires a lot of activity, you can say

running around like a headless chicken

If you are knowingly doing something merely to fend off complaints rather than solve the problem, the activity is a sop

If the problem doesn't exist in the first place, you can refer to it as

tilting at windmills