RPi4 - MySQL issue cannot connect to database

I built a raspbian buster on a RPi3 running MariaDB 10 and I cannot get either of my RPi4's to connect to the DB.

logs are here Full Debug Logs

Logs report

2019-04-11 12:28:42.028 T:2875597680   ERROR: Unable to open database: MyMusic72 [2002](Can't connect to MySQL server on '192.168.1.23' (101))

advancedsettings.xml below

<advancedsettings>
  <videodatabase>
    <type>mysql</type>
    <host>192.168.1.23</host>
    <port>3306</port>
    <user>kodi</user>
    <pass>kodi</pass>
  </videodatabase> 
  <musicdatabase>
    <type>mysql</type>
    <host>192.168.1.23</host>
    <port>3306</port>
    <user>kodi</user>
    <pass>kodi</pass>
  </musicdatabase>
  <videolibrary>
    <importwatchedstate>true</importwatchedstate>
    <importresumepoint>true</importresumepoint>
  </videolibrary>
</advancedsettings>

using heidiSQL on my desktop, I can reach and browse the RPi3 db using the same username/password kodi/kodi as in the advancedsettings.xml

Desktop/ LE 9.2.1 / RPi3 MariaDB are all on the same VLAN. See image

Tried with 2 RPi4's running LE 9.2.1 and both report the same cannot connect message in the logs.

Any thoughts?

Thanks,

Greg

okay, made some progress. I needed to enabled the wait for network option in the LibreElec settings. I now see 2 newly created DB's. I could not update the library it seems and had to rescan the library from scratch. Hopefully everything will work when the scanning is done.