What's needed for thumbs

Hello, I’ve just built PHP 7.0.2 on my server, and it seems like I’m missing something for the thumbs to generate properly, as you can see on my website https://bratteng.me/#work
What do I need to get the thumbs to work?

I used this guide to compile the php http://www.sitepoint.com/run-multiple-versions-php-one-server/

Have you configured PHP with GD lib?

Yes, I built PHP with GD lib

Do you have a thumbs folder in your root folder and is it writeable?

Does the thumbs folder exist and is writable?

Woops, seems like I had forgot to chown the folders. It’s working now