On my wiki, I tried adding a favicon. It was 16 x 16px. It was .ico image. Then it said, in red letters, "Image must be a .ico, min 16px × 16px, max 256px × 256px." Then I tried a bigger favicon and it still didn't work. I tried again and again. The most recent image I uploaded was about 44 x 41px.
Can someone help me?