diff --git a/classes/components/forms/publication/PublishForm.php b/classes/components/forms/publication/PublishForm.php
index 223564bb5b4..386af1fd88e 100644
--- a/classes/components/forms/publication/PublishForm.php
+++ b/classes/components/forms/publication/PublishForm.php
@@ -56,17 +56,35 @@ public function __construct($action, $publication, $submissionContext, $requirem
 
         // Set separate messages and buttons if publication requirements have passed
         if (empty($requirementErrors)) {
+            // Get any warnings that should be displayed when publishing.
+            $submission = Repo::submission()->get($publication->getData('submissionId'));
+            $warnings = Repo::publication()->validatePublishWarnings(
+                $publication,
+                $submission,
+                $submissionContext->getSupportedSubmissionLocales(),
+                $submissionContext->getPrimaryLocale()
+            );
+
+            if (!empty($warnings)) {
+                $msg = '<div class="pkpNotification"><b>' . __('publication.publish.warning') . '</b>';
+                $msg .= '<ul>';
+                foreach ($warnings as $error) {
+                    $msg .= '<li>' . $error . '</li>';
+                }
+                $msg .= '</ul></div><br>';
+            }
+
             $issue = $publication->getData('issueId')
                 ? Repo::issue()->get($publication->getData('issueId'))
                 : null;
-            $msg = __('publication.publish.confirmation');
+            $msg .= __('publication.publish.confirmation');
             $submitLabel = __('publication.publish');
 
             // If the publication is marked as ready to publish,
             // it will be published immediately regardless of the issue assignment
             // or to a future issue, it will be published immediately
             if ($publication->getData('status') == Publication::STATUS_READY_TO_PUBLISH) {
-                $msg = match($issue?->getData('published')) {
+                $msg .= match($issue?->getData('published')) {
                     true => __(
                         'publication.publish.confirmation.backIssue',
                         ['issue' => htmlspecialchars($issue->getIssueIdentification())]
@@ -81,7 +99,7 @@ public function __construct($action, $publication, $submissionContext, $requirem
             }
 
             if ($publication->getData('status') == Publication::STATUS_READY_TO_SCHEDULE) {
-                $msg = __(
+                $msg .= __(
                     'publication.publish.confirmation.futureIssue',
                     ['issue' => htmlspecialchars($issue->getIssueIdentification())]
                 );
@@ -92,7 +110,6 @@ public function __construct($action, $publication, $submissionContext, $requirem
             $publicationVersion = $publication->getVersion();
 
             if (!isset($publicationVersion)) {
-                $submission = Repo::submission()->get($publication->getData('submissionId'));
                 $nextVersion = Repo::submission()->getNextAvailableVersion($submission, Publication::DEFAULT_VERSION_STAGE, false);
 
                 $msg .= '<p>' . __('publication.required.versionStage') . '</p>';
diff --git a/lib/pkp b/lib/pkp
index 1a5a8b1d7e5..02ef9576955 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 1a5a8b1d7e52ad079e4a669d4a6f3795cab9e61f
+Subproject commit 02ef9576955c146e62f87e229accaa75ec52ec8f
diff --git a/plugins/generic/crossref b/plugins/generic/crossref
index 39110fae282..377b9be1157 160000
--- a/plugins/generic/crossref
+++ b/plugins/generic/crossref
@@ -1 +1 @@
-Subproject commit 39110fae282000c3d30ea449d673013b0547b237
+Subproject commit 377b9be1157ad7ab328c37d400b571fa6861be5b