In my website, All other pages have canonical urls in the head section like so:
<link rel="canonical" href="" />

The only page without canonical is the home page `'/'`

When I go to google search console, I keep getting this error:

**URL is not on Google**

Duplicate, submitted URL not selected as canonical

    Referring page
    None detected

Every time I fetch, I hope it will get fix but not happening. Should I add canonical on the home page too pointing itself?