Forum functions.php file issues
 

I had my host move my site to their servers, but now that it's moved, I'm getting these errors at the top of the forums:

Warning: fetch_template() calls should be replaced by the vB_Template class. Template name: pt_navbar_search in [path]/includes/functions.php on line 3957

Warning: Cannot modify header information - headers already sent by (output started at [path]/includes/class_core.php:4495) in [path]/includes/functions.php on line 4902

Warning: fetch_template() calls should be replaced by the vB_Template class. Template name: pt_navbar_link in [path]/includes/functions.php on line 3957

Warning: fetch_template() calls should be replaced by the vB_Template class. Template name: pt_markread_script in [path]/includes/functions.php on line 3957

Could you help maybe speculate why I might be getting such errors from the function php. Basically, I'm prevented from forum navigation because these errors exist. I've already tried uploading the original files to the servers, & re-upgrade process, but this fails to change anything. I'm also thinking that they had to use one of my dumps as well. I'm sure this contributed to it all.