Properly report I/O errors in backup check

CHANGELOG.rst

@@ -21,6 +21,7 @@ Fixed
 * Phone numbers were not properly linked and suboptimally formatted on person page
 * Favicon upload failed with S3 storage.
 * Some preferences were required when they shouldn't, and vice versa.
+* IO errors on accessing backup directory in health check are now properly reported
 
 `2.6`_ - 2022-01-10
 -------------------

aleksis/core/health_checks.py

@@ -33,7 +33,13 @@ class BaseBackupHealthCheck(BaseHealthCheckBackend):
 
     def check_status(self):
         storage = get_storage()
-        backups = storage.list_backups(content_type=self.content_type)
+
+        try:
+            backups = storage.list_backups(content_type=self.content_type)
+        except Exception as ex:
+            self.add_error(_("Error accessing backup storage: {}").format(str(ex)))
+            return
+
         if backups:
             last_backup = backups[:1]
             last_backup_time = dbbackup_utils.filename_to_date(last_backup[0])