diff --git a/addressbook/inc/class.addressbook_import_contacts_csv.inc.php b/addressbook/inc/class.addressbook_import_contacts_csv.inc.php
index a5eb9a6b89..512340f863 100644
--- a/addressbook/inc/class.addressbook_import_contacts_csv.inc.php
+++ b/addressbook/inc/class.addressbook_import_contacts_csv.inc.php
@@ -103,7 +103,7 @@ class addressbook_import_contacts_csv extends importexport_basic_import_csv  {
 		if(!in_array($contact_owner, array_keys($this->bocontacts->get_addressbooks(Api\Acl::ADD))))
 		{
 			$this->warnings[0] = lang("Unable to import into %1, using %2",
-				$contact_owner . ' ('.Api\Accounts::username($contact_owner) . ')',
+				$contact_owner . ' (' . (is_numeric($contact_owner) ? Api\Accounts::username($contact_owner) : $contact_owner) . ')',
 				Api\Accounts::username($this->user)
 			);
 			$contact_owner = 'personal';
diff --git a/addressbook/inc/class.addressbook_wizard_import_contacts_csv.inc.php b/addressbook/inc/class.addressbook_wizard_import_contacts_csv.inc.php
index 5ce2c20335..2f3ddabb17 100644
--- a/addressbook/inc/class.addressbook_wizard_import_contacts_csv.inc.php
+++ b/addressbook/inc/class.addressbook_wizard_import_contacts_csv.inc.php
@@ -108,13 +108,13 @@ class addressbook_wizard_import_contacts_csv extends importexport_wizard_basic_i
 		{
 			$content['msg'] = $this->steps['wizard_step60'];
 			$content['step'] = 'wizard_step60';
-			if(!array_key_exists($content['contact_owner']) && $content['plugin_options']) {
+			if(!array_key_exists('contact_owner', $content) && $content['plugin_options']) {
 				$content['contact_owner'] = $content['plugin_options']['contact_owner'];
 			}
-			if(!array_key_exists($content['owner_from_csv']) && $content['plugin_options']) {
+			if(!array_key_exists('owner_from_csv', $content) && $content['plugin_options']) {
 				$content['owner_from_csv'] = $content['plugin_options']['owner_from_csv'];
 			}
-			if(!array_key_exists($content['change_owner']) && $content['plugin_options']) {
+			if(!array_key_exists('change_owner', $content) && $content['plugin_options']) {
 				$content['change_owner'] = $content['plugin_options']['change_owner'];
 			}
 
diff --git a/importexport/inc/class.importexport_wizard_basic_import_csv.inc.php b/importexport/inc/class.importexport_wizard_basic_import_csv.inc.php
index e2781740e9..51231b59ef 100644
--- a/importexport/inc/class.importexport_wizard_basic_import_csv.inc.php
+++ b/importexport/inc/class.importexport_wizard_basic_import_csv.inc.php
@@ -426,7 +426,7 @@ class importexport_wizard_basic_import_csv
 		$sel_options['action'] = $this->actions;
 
 		// Make at least 1 (empty) conditions
-		$j = count($content['conditions']);
+		$j = count($content['conditions'] ?? []);
 		while ($j < 1)
 		{
 			$content['conditions'][] = array(