Europe/Bucharest] PHP Notice: Undefined offset: 0 in /home/anunturi/public_html/oc-content/plugins/advertisement_manager/index.php on line 277

 //Category check
  $cat = osc_search_category_id();
  $cat = $cat[0];


 Europe/Bucharest] PHP Notice: Undefined offset: 0 in /home/anunturi/public_html/oc-content/plugins/advertisement_manager/index.php on line 122

//Get banner from group
function get_advert( $id ) {
  $cat = osc_search_category_id();
  $cat = $cat[0];

@Gabriel
Go to file:
oc-content/plugins/advertisement_manager/index.php

Find line:
$cat = $cat[0];
Replace with:
$cat = isset($cat[0]) ? $cat[0] : '';
You need to do it twice.

thank you