diff --git a/mod/forum/externallib.php b/mod/forum/externallib.php
index 4757cf338ad..258c8ad8a7c 100644
--- a/mod/forum/externallib.php
+++ b/mod/forum/externallib.php
@@ -830,6 +830,9 @@ class mod_forum_external extends external_api {
 
         $forumvault = $vaultfactory->get_forum_vault();
         $forum = $forumvault->get_from_id($forumid);
+        if (!$forum) {
+            throw new \moodle_exception("Unable to find forum with id {$forumid}");
+        }
         $forumdatamapper = $legacydatamapperfactory->get_forum_data_mapper();
         $forumrecord = $forumdatamapper->to_legacy_object($forum);
 
diff --git a/version.php b/version.php
index e838d63b97e..67f62b46f3c 100644
--- a/version.php
+++ b/version.php
@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2019050100.00;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2019050100.01;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.