Alain Raap

Howard I tried to configure this in the config.php, and in the Caching configuration of Redis, but the redis connection expects a server (IP address/hostname) and a port:

Check this code in cache/stores/redis/lib.php

protected function new_redis($server, $prefix = '', $password = '') {
$redis = new Redis();
$port = null;
if (strpos($server, ':')) {
$serverconf = explode(':', $server);
$server = $serverconf[0];
$port = $serverconf[1];
}
if ($redis->connect($server, $port)) {
if (!empty($password)) {
$redis->auth($password);
}
$redis->setOption(Redis::OPT_SERIALIZER, $this->serializer);
if (!empty($prefix)) {
$redis->setOption(Redis::OPT_PREFIX, $prefix);
}
// Database setting option...
$this->isready = $this->ping($redis);
} else {
$this->isready = false;
}
return $redis;
}

Stan, I'm not familiar with Moodle v3.6.2 or v3.7, what you can try is to manually start a backup or the automated backup php script in your moodle admin/cli folder like
/usr/bin/php admin/cli/automated_backups.php
This gives you some more information what happens when the script is running. We also have had problems with this process, but that was due to our environment (Redhat Linux) and because of performance issues. Our automated backup is running on our database server now and that works well. You can find in this forum how I configured this on Redhat.

@Tyson, you can also try the command ldapsearch to test the connection with the LDAP server on your Moodle webserver:

ldapsearch -H "ldap://your-ldap-server-hostname/" -b "OU=UID,DC=your-organization,DC=country" -D "CN=..,OU=..,OU=..,OU=..,DC=..,DC=your-organization,DC=country" -w[bind user password] -s sub "cn="your-name-or-userid"