Q: search in tunes store not working

I am using iTunes 12.3.2.25 , 64-bit on my Windows 10 laptop.

Suddenly search bar in store doesn't work.  No error message, just ... nothing.  I can type in my keywords and hit enter, and it just acts like nothing happened.

Search in "my itunes" (searching my downloaded music and such) works as normal.

Incidentally, itunes store seems slow to load, too.  Internet connection is fine and everything else is running as usual.