diff --git a/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php b/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php
index 4ba768032ab26e0ec0b3f4f55df92f58a2ff2651..96833ed5b699aa0f61baeaeaa4201e4c078c6328 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php
@@ -474,12 +474,19 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
         $zip = '';
         $city = '';
         if (!empty($result['names'])) {
-            $name = $result['names'][0];
-            list($lastname, $firstname) = explode(', ', $name, 2);
+            $nameParts = explode(', ', $result['names'][0], 2);
+            $lastname = $nameParts[0];
+            $firstname = $nameParts[1] ?? '';
         }
         if (!empty($result['addresses'][0]['lines'][1])) {
             $address = $result['addresses'][0]['lines'][0];
-            list($zip, $city) = explode(' ', $result['addresses'][0]['lines'][1], 2);
+            $postalParts = explode(' ', $result['addresses'][0]['lines'][1], 2);
+            if (isset($postalParts[1])) {
+                $zip = $postalParts[0];
+                $city = $postalParts[1];
+            } else {
+                $city = $postalParts[0];
+            }
         }
         $expirationDate = !empty($result['expirationDate'])
                 ? $this->dateConverter->convertToDisplayDate(
@@ -609,7 +616,9 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
                 $patron
             );
             if (!empty($result['code'])) {
-                $msg = $this->formatErrorMessage($result['description']);
+                $msg = $this->formatErrorMessage(
+                    $result['description'] ?? $result['name']
+                );
                 $finalResult['details'][$itemId] = [
                     'item_id' => $itemId,
                     'success' => false,
@@ -660,7 +669,7 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
             'GET',
             $patron
         );
-        if (isset($result['code'])) {
+        if (!empty($result['code'])) {
             return [
                 'success' => false,
                 'status' => 146 === $result['code']
@@ -838,11 +847,13 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
 
         foreach ($details as $holdId) {
             $result = $this->makeRequest(
-                ['v3', 'patrons', 'holds', $holdId], [], 'DELETE', $patron
+                ['v5', 'patrons', 'holds', $holdId], [], 'DELETE', $patron
             );
 
             if (!empty($result['code'])) {
-                $msg = $this->formatErrorMessage($result['description']);
+                $msg = $this->formatErrorMessage(
+                    $result['description'] ?? $result['name']
+                );
                 $response[$holdId] = [
                     'item_id' => $holdId,
                     'success' => false,
@@ -907,7 +918,7 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
             'GET',
             $patron
         );
-        if (isset($result['code'])) {
+        if (!empty($result['code'])) {
             // An error was returned
             $this->error(
                 "Request for pickup locations returned error code: {$result['code']}"
@@ -1060,7 +1071,7 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
         );
 
         if (!empty($result['code'])) {
-            return $this->holdError($result['description']);
+            return $this->holdError($result['description'] ?? $result['name']);
         }
         return ['success' => true];
     }
@@ -1191,10 +1202,12 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
             $patron
         );
 
-        if (isset($result['code']) && $result['code'] != 0) {
+        if (!empty($result['code'])) {
             return [
                 'success' => false,
-                'status' => $this->formatErrorMessage($result['description'])
+                'status' => $this->formatErrorMessage(
+                    $result['description'] ?? $result['name']
+                )
             ];
         }
         return ['success' => true, 'status' => 'change_password_ok'];