Custom Structure – permalinks

I have custom permalink for my pages, the structure is simple “main url/page name (Spanish-aid.co.uk/yourblog). But for some reason, when I click on one of my post the url duplicate itself https://www.spanish-aid.co.uk/http:/www.spanish-aid.co.uk/example#respond and I get the 404 error. If I reset my permalinks to the default settings the problem is resolved. I have no Idea why this is happening.

Is there any way that I can have custom permalinks and access to my posts at the same time?

Thanks a lot
Luisiher