diff --git a/classes/setting_helper.php b/classes/setting_helper.php
index 5dd370d1..c10a8c5c 100644
--- a/classes/setting_helper.php
+++ b/classes/setting_helper.php
@@ -1,153 +1,154 @@
-<?php
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * Helper class for admin settings.
- *
- * @package    block_opencast
- * @copyright  2020 Alexander Bias, Ulm University <alexander.bias@uni-ulm.de>
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-namespace block_opencast;
-
-use block_opencast\local\apibridge;
-use coding_exception;
-use dml_exception;
-use Exception;
-use lang_string;
-use tool_opencast\empty_configuration_exception;
-
-/**
- *  Helper class for admin settings.
- *
- * @package    block_opencast
- * @copyright  2020 Alexander Bias, Ulm University <alexander.bias@uni-ulm.de>
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class setting_helper {
-
-
-    /**
-     * Validate if the selected workflow does indeed exist.
-     *
-     * @param string $data Setting value
-     * @return false|lang_string|string
-     * @throws coding_exception
-     */
-    public static function validate_workflow_setting($data) {
-        if ($data == null) {
-            return false;
-        }
-
-        // Hack to get the opencast instance id.
-        $category = optional_param('category', null, PARAM_RAW);
-        if ($category) {
-            $ocinstanceid = intval(str_replace('block_opencast_instance_', '', $category));
-        } else {
-            $section = optional_param('section', null, PARAM_RAW);
-            $ocinstanceid = intval(str_replace('block_opencast_importvideossettings_', '', $section));
-        }
-
-        // Get an APIbridge instance.
-        $apibridge = apibridge::get_instance($ocinstanceid);
-
-        // Verify if the given value is a valid Opencast workflow.
-        if (!$apibridge->check_if_workflow_exists($data)) {
-            return get_string('workflow_not_existing', 'block_opencast');
-        }
-        return false;
-    }
-
-    /**
-     * Returns available workflows with the given tag.
-     * @param int $ocinstanceid Opencast instance id.
-     * @param string $workflowtags comma separated list of tags
-     * @return array|opencast_connection_exception|Exception|empty_configuration_exception|null
-     */
-    public static function load_workflow_choices($ocinstanceid, $workflowtags) {
-        // Don't load anything during initial installation.
-        // This is important as the Opencast API is not set up during initial installation.
-        if (during_initial_install()) {
-            return null;
-        }
-
-        try {
-            // Get the available workflows.
-            $apibridge = apibridge::get_instance($ocinstanceid);
-
-            // Set workflows as choices. This is even done if there aren't any (real) workflows returned.
-            return $apibridge->get_available_workflows_for_menu($workflowtags, true);
-
-            // Something went wrong and the list of workflows could not be retrieved.
-        } catch (opencast_connection_exception | empty_configuration_exception $e) {
-            return $e;
-        }
-    }
-
-    /**
-     * Ensures that the owner setting corresponds to a role defined in the ACL table and
-     * fulfills the requirements for the owner role.
-     *
-     * @param string $data Setting data
-     * @return bool|lang_string|string
-     * @throws coding_exception
-     * @throws dml_exception
-     */
-    public static function validate_aclownerrole_setting($data) {
-        // Hack to get the opencast instance id.
-        $category = optional_param('category', null, PARAM_RAW);
-        if ($category) {
-            $ocinstanceid = intval(ltrim($category, 'block_opencast_instance_'));
-        } else {
-            $section = optional_param('section', null, PARAM_RAW);
-            $ocinstanceid = intval(ltrim($section ?? '', 'block_opencast_importvideossettings_'));
-        }
-
-        // Do only if a workflow was set.
-        if (!empty($data)) {
-            $roles = json_decode(get_config('block_opencast', 'roles_' . $ocinstanceid));
-            $role = array_search($data, array_column($roles, 'rolename'));
-            if ($role === false) {
-                // Role isn't defined as ACL role.
-                return get_string('role_not_defined', 'block_opencast');
-            }
-
-            if (!$roles[$role]->permanent) {
-                // Role isn't defined as permanent.
-                return get_string('role_not_permanent', 'block_opencast');
-            }
-
-            $userrelated = false;
-            $userplaceholders = ['[USERNAME]', '[USERNAME_LOW]', '[USERNAME_UP]', '[USER_EMAIL]', '[USER_EXTERNAL_ID]'];
-            foreach ($userplaceholders as $placeholder) {
-                if (strpos($data, $placeholder) !== false) {
-                    $userrelated = true;
-                    break;
-                }
-            }
-
-            if (!$userrelated) {
-                // Role is not user-related.
-                return get_string('role_not_user_related', 'block_opencast');
-            }
-
-            return true;
-        }
-
-        return true;
-    }
-}
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Helper class for admin settings.
+ *
+ * @package    block_opencast
+ * @copyright  2020 Alexander Bias, Ulm University <alexander.bias@uni-ulm.de>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace block_opencast;
+
+use block_opencast\local\apibridge;
+use coding_exception;
+use dml_exception;
+use Exception;
+use lang_string;
+use tool_opencast\empty_configuration_exception;
+
+/**
+ *  Helper class for admin settings.
+ *
+ * @package    block_opencast
+ * @copyright  2020 Alexander Bias, Ulm University <alexander.bias@uni-ulm.de>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class setting_helper {
+
+
+    /**
+     * Validate if the selected workflow does indeed exist.
+     *
+     * @param string $data Setting value
+     * @return false|lang_string|string
+     * @throws coding_exception
+     */
+    public static function validate_workflow_setting($data) {
+        if ($data == null) {
+            return false;
+        }
+
+        // Hack to get the opencast instance id.
+        $category = optional_param('category', null, PARAM_RAW);
+        if ($category) {
+            $ocinstanceid = intval(str_replace('block_opencast_instance_', '', $category));
+        } else {
+            $section = optional_param('section', null, PARAM_RAW);
+            $ocinstanceid = intval(str_replace('block_opencast_importvideossettings_', '', $section));
+        }
+
+        // Get an APIbridge instance.
+        $apibridge = apibridge::get_instance($ocinstanceid);
+
+        // Verify if the given value is a valid Opencast workflow.
+        if (!$apibridge->check_if_workflow_exists($data)) {
+            return get_string('workflow_not_existing', 'block_opencast');
+        }
+        return false;
+    }
+
+    /**
+     * Returns available workflows with the given tag.
+     * @param int $ocinstanceid Opencast instance id.
+     * @param string $workflowtags comma separated list of tags
+     * @return array|opencast_connection_exception|Exception|empty_configuration_exception|null
+     */
+    public static function load_workflow_choices($ocinstanceid, $workflowtags) {
+        // Don't load anything during initial installation.
+        // This is important as the Opencast API is not set up during initial installation.
+        if (during_initial_install()) {
+            return null;
+        }
+
+        try {
+            // Get the available workflows.
+            $apibridge = apibridge::get_instance($ocinstanceid);
+
+            // Set workflows as choices. This is even done if there aren't any (real) workflows returned.
+            return $apibridge->get_available_workflows_for_menu($workflowtags, true);
+
+            // Something went wrong and the list of workflows could not be retrieved.
+        } catch (opencast_connection_exception | empty_configuration_exception $e) {
+            return $e;
+        }
+    }
+
+    /**
+     * Ensures that the owner setting corresponds to a role defined in the ACL table and
+     * fulfills the requirements for the owner role.
+     *
+     * @param string $data Setting data
+     * @return bool|lang_string|string
+     * @throws coding_exception
+     * @throws dml_exception
+     */
+    public static function validate_aclownerrole_setting($data) {
+        // Hack to get the opencast instance id.
+        $category = optional_param('category', null, PARAM_RAW);
+        if ($category) {
+            $ocinstanceid = intval(ltrim($category, 'block_opencast_instance_'));
+        } else {
+            $section = optional_param('section', null, PARAM_RAW);
+            $ocinstanceid = intval(ltrim($section ?? '', 'block_opencast_importvideossettings_'));
+        }
+
+        $ocinstanceid = $ocinstanceid == 0 ? 1 : $ocinstanceid;
+        // Do only if a workflow was set.
+        if (!empty($data)) {
+            $roles = json_decode(get_config('block_opencast', 'roles_' . $ocinstanceid));
+            $role = array_search($data, array_column($roles, 'rolename'));
+            if ($role === false) {
+                // Role isn't defined as ACL role.
+                return get_string('role_not_defined', 'block_opencast');
+            }
+
+            if (!$roles[$role]->permanent) {
+                // Role isn't defined as permanent.
+                return get_string('role_not_permanent', 'block_opencast');
+            }
+
+            $userrelated = false;
+            $userplaceholders = ['[USERNAME]', '[USERNAME_LOW]', '[USERNAME_UP]', '[USER_EMAIL]', '[USER_EXTERNAL_ID]'];
+            foreach ($userplaceholders as $placeholder) {
+                if (strpos($data, $placeholder) !== false) {
+                    $userrelated = true;
+                    break;
+                }
+            }
+
+            if (!$userrelated) {
+                // Role is not user-related.
+                return get_string('role_not_user_related', 'block_opencast');
+            }
+
+            return true;
+        }
+
+        return true;
+    }
+}