My client wanted a better blog so she could link articles for social media etc. She didn't want to upgrade her site to 2.5 or later. So i saw that k2 works for 1.5 as well..... so i thought perfect!
I installed k2 like normal and everything works fine and i can get the articles to show up in the category layout but when i click on the title or read more to that article i just get a blank white page.

I have searched it on google and have came up with nothing. There was one post with clearing your cache and cookies and such but no luck with that.

Can anyone help me? I have been trying to work on a solution for hours now....

you can check SEF and .htcess of site.

You must enable error reporting in order to see the actual error.

It can be something ranging from memory limit (server configuration) to an error in your template.

Warning: require_once(/var/www/vhosts/mywebsite.com/httpdocs/components/com_mailto/helpers/mailto.php): failed to open stream: No such file or directory in /var/www/vhosts/mywebsite.com/httpdocs/components/com_k2/views/item/view.html.php on line 321

This is the error i receive

Are you using the latest version of Joomla! - 1.5.26 and the latest version of K2 as well? Also can you send me a link to your site?

I updated and removed a couple plugins and made sure it was running the current 1.5.26 and it seemed to fix the issue. It was running 1.5.25

I guess i should have done that first :) thanks everyone!