The usual - Zabbix Server is not running - user zabbix denied access to db

[SeanRinVA]

Zabbix 5.0.1 on Ubuntu 20.04
MariaDB

Receiving the dreaded Access denied for user 'zabbix'@'localhost' using password error when Zabbix server starts

I have confirmed proper settings in zabbix_server.conf and zabbix.conf.php
I have run mysql -uzabbix -p'pwd', including running various queries without error

Zabbix Server Log:

549075:20210108:130320.580 Starting Zabbix Server. Zabbix 5.0.7 (revision 1b3db7f980).
549075:20210108:130320.580 ****** Enabled features ******
549075:20210108:130320.580 SNMP monitoring: YES
549075:20210108:130320.580 IPMI monitoring: YES
549075:20210108:130320.580 Web monitoring: YES
549075:20210108:130320.580 VMware monitoring: YES
549075:20210108:130320.580 SMTP authentication: YES
549075:20210108:130320.580 ODBC: YES
549075:20210108:130320.580 SSH support: YES
549075:20210108:130320.580 IPv6 support: YES
549075:20210108:130320.580 TLS support: YES
549075:20210108:130320.580 ******************************
549075:20210108:130320.580 using configuration file: /etc/zabbix/zabbix_server.conf
549075:20210108:130320.585 [Z3001] connection to database 'zabbix' failed: [1045] Access denied for user 'zabbix'@'localhost' (using password: YES)
549075:20210108:130320.585 database is down: reconnecting in 10 seconds

zabbix.server.conf:

DBHost=localhost
DBName=zabbix
DBUser=zabbix
DBPassword='pwd'
DBSocket (defaults)
DBPort (defaults)

zabbix.conf.php:

$DB['TYPE'] = 'MYSQL';
$DB['SERVER'] = 'localhost';
$DB['PORT'] = '0';
$DB['DATABASE'] = 'zabbix';
$DB['USER'] = 'zabbix';
$DB['PASSWORD'] = 'pwd';

$ZBX_SERVER = '192.168.1.63';             #Tried 'localhost' w/ same results
$ZBX_SERVER_PORT = '10051';            #Tried '10050' w/ same results
$ZBX_SERVER_NAME = '';

Am I missing any bits of info which would help troublehoot?