Installed on VB 3.8.5 and only had one error that was quickly resolved with the following edit to Vbay.php on Line 130 right after the SELECT * FROM there is an extra ' before the " that needs to be removed for the link to the category to work correctly.
Code:
$get_all_items = $db->query("SELECT * FROM `" . TABLE_PREFIX . "vbay_items` where completed='0' AND catid = '" . $vbulletin->GPC['showcat'] . "' " . $sort . " LIMIT " . ($limitlower - 1) . ", " . $vbulletin->GPC['max'] . "");
Code:
$get_all_items = $db->query("SELECT * FROM " . TABLE_PREFIX . "vbay_items` where completed='0' AND catid = '" . $vbulletin->GPC['showcat'] . "' " . $sort . " LIMIT " . ($limitlower - 1) . ", " . $vbulletin->GPC['max'] . "");