Problem using Facebook OpenGraph (og:url // canonical url)

I’m trying to implement as best as I can my Facebook app with my blog, but when i try to use the social publisher I only get errors.
I think it has to do with me, somehow, entering my blogs canonical url the same as it’s “standard” url. But if that’s the case, I can’t for the life of me remember where I did (either in wordpress or in facebook developers page)

I’m new to meta-tags and terms like “og:url”.

Exact error messages (WordPress):

Failed posting to SunnFolk’s Timeline. Error: {“message”:”(#1) An error occured while creating the share”,”type”:”OAuthException”}

Failed posting to your Facebook Timeline. Error: {“message”:”(#3502) Object at URL https://sunnfolk.net78.net/?p=150 has og:type of ‘website’. The property ‘article’ requires an object of og:type ‘article’. “,”type”:”OAuthException”}

Facebook developers debug:

Object at URL ‘https://sunnfolk.net78.net’ of type ‘website’ is invalid because it specifies multiple ‘og:url’ values: https://sunnfolk.net78.net, https://sunnfolk.net78.net/.

If I for some reason have to manually change my blogs metatags or do any other type of coding, step-by-step directions would be greatly appreciated.