hello sir i upload a content of ads in these tables oc_t_item , oc_t_item_description,oc_t_item_location but when i go to the search page

http://localhost:88/osclass3.8.0a/index.php?page=search


it appear to me this warning


Warning: Illegal string offset 'pk_i_id' in C:\xampp\htdocs\osclass3.8.0a\oc-content\themes\dreamfree\search-sidebar.php on line 4

Warning: Cannot assign an empty string to a string offset in C:\xampp\htdocs\osclass3.8.0a\oc-content\themes\dreamfree\search-sidebar.php on line 4

can i know why this warning appear thanks in advanced

@Ahmed
Something is wrong most probably, but you will have to debug that as it is not possible to do migration via forum