At the first connection, $_SESSION['poscart'] is empty or null and when you try to add an item to the cart in cashdesk you got this:
Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/35/d523563538/htdocs/clickandbuilds/dolibarr/afds/cashdesk/class/Facturation.class.php on line 145
Warning: Cannot modify header information - headers already sent by (output started at /homepages/35/d523563538/htdocs/clickandbuilds/dolibarr/afds/cashdesk/class/Facturation.class.php:145) in /homepages/35/d523563538/htdocs/clickandbuilds/dolibarr/afds/cashdesk/facturation_verif.php on line 234
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