Kunena forum post not loading correctly

Inspired by one of the youtube videos by Nick I installed Kunena. The welcome message that installs (first forum post) can be read by guests but not by registered users. After logging in and clicking on the post the page will be loaded up to 95%. The page itself remains blanc. When you hover te page you can see the links are there.
Maybe this is a conflict with the template (because protostar works fine) but I'm not sure. I can't find what is the problem.

Can you please take a look into this? I can give you a username/password by email if you like.

site: www.platformvoorprofessionals.nl/forum
Joomla 3.6.5
JF Sirena template 1.2
CB 2.1.2

Almost certain that it is a conflict with your template. But try to set Error reporting to maximum or check the server error logs. Maybe that wil give you a clue about what is wrong. Or ask template developer.

Astrid,
You're right. It seems to be a conflict with the preloaded in this template. Disabling this results in correct loading of the desired page(s). I will contact the template developer because the Sirena template is a template which is advised by CB. They'll probably fix this (or at least help me fix this).

Thanx!
Peter

Looks like a styling conflict between your template and Kunenas. You probably need to use the Bootstrap 3 template Kunena provides if your Joomla template is Bootstrap 3 or tell Kunena to load Bootstrap 2. We however are not the developers of Kunena and recommend posting Kunena specific issues on their forums below for best answers.

www.kunena.org/forum/index