Blog error

I have problem with news..
I tried to preview my published post and then i had that so called “white screen of death”. After that i used the wordpress debug function code to see what type of error i have.
Here is the outcome:

Fatal error: Cannot redeclare post_templates_plugin_init() (previously declared in /home/wizweavers/financiat.net/wp-content/themes/funding_press/post_templates.php:116) in /home/wizweavers/financiat.net/wp-content/themes/funding_press/functions/post_templates.php on line 117