fix: invoice address must be array on save

src/QUI/ERP/Accounting/Invoice/InvoiceTemporary.php

@@ -353,6 +353,8 @@ public function getCustomer()
             'email'     => $User->getAttribute('email')
         ];
 
+        $Customer = false;
+
         try {
             $Customer = QUI\ERP\User::convertUserToErpUser($User);
             $userData = $Customer->getAttributes();
@@ -390,10 +392,6 @@ public function getCustomer()
             }
         }
 
-        if (!empty($this->getAttribute('contact_person'))) {
-            $userData['quiqqer.erp.customer.contact.person'] = $this->getAttribute('contact_person');
-        }
-
         if (empty($userData['country'])) {
             $userData['country'] = QUI\ERP\Defaults::getCountry()->getCode();
         }
@@ -767,8 +765,9 @@ public function update($PermissionUser = null)
                 $invoiceAddressCheck['contactEmail'] = $contactEmail;
 
                 $invoiceAddress = \json_encode($invoiceAddressCheck);
-            } else {
+            } elseif (\is_array($invoiceAddress)) {
                 $invoiceAddress['contactEmail'] = $contactEmail;
+                $invoiceAddress                 = \json_encode($invoiceAddress);
             }
 
             if (!$invoiceAddressCheck) {