MS outlook "Search function" does not function at all

I am not sure when the function started not to function, however whenever I try to find any words in the subject area or any words in message contents the result is not returned. One thing I am wondering is anytime I was trying to find, the icon of magnifier which is showing running the function stops within one second, very short.

The outlook is running on Win 11.

My pc is HP Pavilion laptop 15-eg0xxx.