Email alerts are not working after upgrade

Email alerts stopped sending notifications after upgrading to the latest Librenms version.

See the following output from ./validate.php

[email protected]:~$ ./validate.php

Component Version
LibreNMS 21.11.0-7-g7e98e0333
DB Schema 2021_11_12_123037_change_cpwVcID_to_unsignedInteger (225)
PHP 7.4.3
Python 3.8.10
MySQL 10.3.31-MariaDB-0ubuntu0.20.04.1
RRDTool 1.7.2
SNMP NET-SNMP 5.8

====================================

[OK] Composer Version: 2.1.11
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
rrd/.gitignore

Any assistance would be appreciated.

Can you supply any sort of information?