I have found 3 topics with the same problem as me, but nobody ever got an answer.
The most interesting one is this one: Duplicate // double slash URL's
→ It also refers the two other topics talking about this same problem.
THE PROBLEM: my SEO agency tells me my site is producing duplicate content. Their analysis tool finds pages with the same cotent, the only difference being the url. The second url has double slash “//” instead of one.
I emailed the support team. They were able to fix my issue (I think! I have to ask the SEO company to rescan)
They told me to remove the trailing / from the end of the global canonical.
Hey there, Sori, thank you so much. I discovered exactly that problem from a report from ahrefs.com (free-level account, I might add). That helped me know what the problem was, and a search helped me find your answer. It was YOUR answer that took me to the canonical url configuration under Settings>SEO. Bravo, thank you-thank-you!
I found the answer to the double slashes // in the canonical tag.
Webflow automatically adds a slash to the end of your canonical URL so if you include a slash on the SEO settings page then you end up with a double slash. Simply remove the slash from your URL and it’s fixed!