diff --git a/.github/workflows/exakat.yml b/.github/workflows/exakat.yml
index 1d134ff2455..528626e0308 100644
--- a/.github/workflows/exakat.yml
+++ b/.github/workflows/exakat.yml
@@ -12,7 +12,7 @@ jobs:
   exakat:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Exakat
       uses: docker://exakat/exakat-ga
       with:
diff --git a/htdocs/commande/list.php b/htdocs/commande/list.php
index 350674370e9..264613ac597 100644
--- a/htdocs/commande/list.php
+++ b/htdocs/commande/list.php
@@ -2319,8 +2319,11 @@ if ($resql) {
 
 					$numlines = count($generic_commande->lines); // Loop on each line of order
 					for ($lig = 0; $lig < $numlines; $lig++) {
-						$reliquat = $generic_commande->lines[$lig]->qty - $generic_commande->expeditions[$generic_commande->lines[$lig]->id];
-
+						if (isset($generic_commande->expeditions[$generic_commande->lines[$lig]->id])) {
+							$reliquat =  $generic_commande->lines[$lig]->qty - $generic_commande->expeditions[$generic_commande->lines[$lig]->id];
+						} else {
+							$reliquat = $generic_commande->lines[$lig]->qty;
+						}
 						if ($generic_commande->lines[$lig]->product_type == 0 && $generic_commande->lines[$lig]->fk_product > 0) {  // If line is a product and not a service
 							$nbprod++; // order contains real products
 							$generic_product->id = $generic_commande->lines[$lig]->fk_product;
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 7f2ffb3ddad..8cca3e5defe 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4312,7 +4312,7 @@ abstract class CommonObject
 		if ($elementTable == 'commande_fournisseur_dispatch') {
 			$fieldstatus = "status";
 		}
-		if (is_array($this->fields) && array_key_exists('status', $this->fields)) {
+		if (isset($this->fields) && is_array($this->fields) && array_key_exists('status', $this->fields)) {
 			$fieldstatus = 'status';
 		}
 
diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 625e473e7e6..baae549c050 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -1273,10 +1273,12 @@ class ExtraFields
 					require_once DOL_DOCUMENT_ROOT.'/categories/class/categorie.class.php';
 					$data = $form->select_all_categories(Categorie::$MAP_ID_TO_CODE[$InfoFieldList[5]], '', 'parent', 64, $InfoFieldList[6], 1, 1);
 					$out .= '<option value="0">&nbsp;</option>';
-					foreach ($data as $data_key => $data_value) {
-						$out .= '<option value="'.$data_key.'"';
-						$out .= ($value == $data_key ? ' selected' : '');
-						$out .= '>'.$data_value.'</option>';
+					if (is_array($data)) {
+						foreach ($data as $data_key => $data_value) {
+							$out .= '<option value="'.$data_key.'"';
+							$out .= ($value == $data_key ? ' selected' : '');
+							$out .= '>'.$data_value.'</option>';
+						}
 					}
 				}
 			}
diff --git a/htdocs/core/class/stats.class.php b/htdocs/core/class/stats.class.php
index 49a2c6d4403..63125fffd9f 100644
--- a/htdocs/core/class/stats.class.php
+++ b/htdocs/core/class/stats.class.php
@@ -233,6 +233,12 @@ abstract class Stats
 		return $data;
 	}
 
+	/**
+	 * @param	int     $year           year number
+	 * @return 	int						value
+	 */
+	protected abstract function getAverageByMonth($year);
+
 	/**
 	 * Return average of entity by month for several years
 	 *
diff --git a/htdocs/expedition/card.php b/htdocs/expedition/card.php
index 781a5c690cf..0508c51dfae 100644
--- a/htdocs/expedition/card.php
+++ b/htdocs/expedition/card.php
@@ -429,10 +429,10 @@ if (empty($reshook)) {
 			if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 					$newlang = GETPOST('lang_id', 'aZ09');
 				}
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+				if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 					$newlang = $object->thirdparty->default_lang;
 				}
 				if (!empty($newlang)) {
@@ -982,7 +982,7 @@ if ($action == 'create') {
 			print "</td></tr>\n";
 
 			// Other attributes
-			$parameters = array('objectsrc' => $objectsrc, 'colspan' => ' colspan="3"', 'cols' => '3', 'socid' => $socid);
+			$parameters = array('objectsrc' => isset($objectsrc) ? $objectsrc : '', 'colspan' => ' colspan="3"', 'cols' => '3', 'socid' => $socid);
 			$reshook = $hookmanager->executeHooks('formObjectOptions', $parameters, $expe, $action); // Note that $action and $object may have been modified by hook
 			print $hookmanager->resPrint;
 
@@ -1178,7 +1178,7 @@ if ($action == 'create') {
 
 					// Qty already shipped
 					print '<td class="center">';
-					$quantityDelivered = $object->expeditions[$line->id];
+					$quantityDelivered = isset($object->expeditions[$line->id]) ? $object->expeditions[$line->id] : '';
 					print $quantityDelivered;
 					print '<input name="qtydelivered'.$indiceAsked.'" id="qtydelivered'.$indiceAsked.'" type="hidden" value="'.$quantityDelivered.'">';
 					print ''.$unit_order.'</td>';
@@ -1188,14 +1188,18 @@ if ($action == 'create') {
 					if ($line->product_type == 1 && empty($conf->global->STOCK_SUPPORTS_SERVICES)) {
 						$quantityToBeDelivered = 0;
 					} else {
-						$quantityToBeDelivered = $quantityAsked - $quantityDelivered;
+						if (is_numeric($quantityDelivered)) {
+							$quantityToBeDelivered = $quantityAsked - $quantityDelivered;
+						} else {
+							$quantityToBeDelivered = $quantityAsked;
+						}
 					}
 
 					$warehouseObject = null;
 					if (count($warehousePicking) == 1 || !($line->fk_product > 0) || empty($conf->stock->enabled)) {     // If warehouse was already selected or if product is not a predefined, we go into this part with no multiwarehouse selection
 						print '<!-- Case warehouse already known or product not a predefined product -->';
 						//ship from preselected location
-						$stock = + $product->stock_warehouse[$warehouse_id]->real; // Convert to number
+						$stock = + (isset($product->stock_warehouse[$warehouse_id]->real) ? $product->stock_warehouse[$warehouse_id]->real : 0); // Convert to number
 						$deliverableQty = min($quantityToBeDelivered, $stock);
 						if ($deliverableQty < 0) {
 							$deliverableQty = 0;
diff --git a/htdocs/expedition/class/expedition.class.php b/htdocs/expedition/class/expedition.class.php
index 77620585b98..2de87f93666 100644
--- a/htdocs/expedition/class/expedition.class.php
+++ b/htdocs/expedition/class/expedition.class.php
@@ -933,7 +933,7 @@ class Expedition extends CommonObject
 				return -1;
 			}
 
-			if ($conf->global->STOCK_MUST_BE_ENOUGH_FOR_SHIPMENT) {
+			if (!empty($conf->global->STOCK_MUST_BE_ENOUGH_FOR_SHIPMENT)) {
 				$product = new Product($this->db);
 				$product->fetch($fk_product);