diff --git a/lam/lib/modules/windowsUser.inc b/lam/lib/modules/windowsUser.inc
index 74a95e044..aa0af56db 100644
--- a/lam/lib/modules/windowsUser.inc
+++ b/lam/lib/modules/windowsUser.inc
@@ -5277,8 +5277,8 @@ if (interface_exists('\LAM\JOB\Job', false)) {
 		/**
 		 * Returns if the job should run.
 		 *
-		 * @param $pdo PDO
-		 * @param $jobId job id
+		 * @param PDO $pdo PDO
+		 * @param string $jobId job id
 		 * @param DateTime $baseDate base date
 		 * @param int $monthInterval month interval
 		 * @return bool should run
@@ -5512,15 +5512,7 @@ if (interface_exists('\LAM\JOB\Job', false)) {
 		}
 
 		/**
-		 * Checks if a user is expired.
-		 *
-		 * @param integer $jobID job ID
-		 * @param array $options job settings
-		 * @param PDO $pdo PDO
-		 * @param DateTime $now current time
-		 * @param array $policyOptions list of policy options by getPolicyOptions()
-		 * @param array $user user attributes
-		 * @param boolean $isDryRun just do a dry run, nothing is modified
+		 * {@inheritDoc}
 		 */
 		protected function checkSingleUser($jobID, $options, &$pdo, $now, $policyOptions, $user, $isDryRun) {
 			$seconds = substr($user['accountexpires'][0], 0, -7);
diff --git a/lam/lib/persistence.inc b/lam/lib/persistence.inc
index da850299c..169d6e05f 100644
--- a/lam/lib/persistence.inc
+++ b/lam/lib/persistence.inc
@@ -342,7 +342,7 @@ class ConfigDataImporter {
 					$steps[] = new ImporterStep(_('General settings'), 'mainConfig', $value);
 					break;
 				case 'certificates':
-					$steps[] = new ImporterStep(_('SSL certificates'), 'certificates', $value);
+					$steps[] = new ImporterStep(_('SSL certificates'), 'certificates', [$value]);
 					break;
 				case 'serverProfiles':
 					$mainStep = new ImporterStep(_('Server profiles'), 'serverProfiles', $value);
@@ -424,7 +424,7 @@ class ConfigDataImporter {
 	 * Runs the actual import.
 	 *
 	 * @param ImporterStep[] $steps import steps
-	 * @throws LAMException if error occurred
+	 * @throws LAMException if an error occurred
 	 */
 	public function runImport($steps) {
 		foreach ($steps as $step) {
@@ -434,7 +434,7 @@ class ConfigDataImporter {
 			$key = $step->getKey();
 			match ($key) {
 				'mainConfig' => $this->importMainConfig($step->getValue()),
-				'certificates' => $this->importCertificates($step->getValue()),
+				'certificates' => $this->importCertificates($step->getValue()[0]),
 				'serverProfiles' => $this->importServerProfiles($step),
 				'accountProfiles' => $this->importAccountProfiles($step),
 				'accountProfileTemplates' => $this->importAccountProfileTemplates($step),