The specified transmission protocols (http or https) must match in the config files and the file "/conf/system.conf.php" because it can cause connection problems otherwise.
If you make changes to the configuration, verify that the constants in "/conf/system.conf.php" correspond with the new values.
message_offset_ms is the maximum time interval in ms, from the generation of the request until their evaluation. By default a maximum of two seconds are set. If problems due to widely separated time stamp occurs, you can increase the value. It is preferable to synchronize the server time on the servers of the repository and the rendering service.
message_send_offset_ms can be used to compensate for a time difference, if the time stamp of the request lies after the time stamp is its evaluation.