Inactive links in pages and posts

I use this theme Multipurpose for making a childtheme, and everything works great, except one important thing: Using a-tag links in the wordpress page-editor and post-editor does not work. Inside the editor it look fine, but when publishing a page or a post, the link text appears like normal text when visiting the website. I have never experienced this before with other themes so I expect it has something to do with the multipurpose theme. To make links work I embed buttons and forms directly in the coded theme files (page.php, etc) in the childtheme. Still, this is not a good solution for the future, so can you please help me? I’m still quite a newbie to this, so bear with me.