I added a link tag in the header of some pages like this:
<link rel="canonical" href="https://wazedomain.com/page" />
But I still get the error for pages like:
"https://wazedomain.com/page/disclaimer"
"https://wazedomain.com/page/privacy"
I read on Google that if I add the rel="canonical" tag on my link, it will work but it didn't.
You're still getting errors likely because you added the wrong canonicals.
In the page https://wazedomain.com/page/disclaimer, the canonical points to https://wazedomain.com/, which is your homepage. That would mean the canon, or original, or main, of the disclaimer page is your homepage. That makes no sense.