Forum Problem with vb 4.0 when accessing the forum or admin CP
 

after upgrading from 3.8.4 to 4.0.0 i got this error message

Warning: fetch_template() calls should be replaced by the vB_Template class in [path]/includes/functions.php on line 3895

Warning: array_merge() [function.array-merge]: Argument #1 is not an array in [path]/includes/class_bootstrap.php(1133) : eval()'d code on line 1

Fatal error: Call to a member function query_first() on a non-object in /home2/arabitwo/public_html/vb/includes/class_bootstrap.php(283) : eval()'d code on line 145

Would somebody please help me how to fix the issue