I'm receiving this DB error as well, I'm running Windows10.
I'm a returning player, I havnt played on P99 since 2018. I wanted to play again (now 2021, roughly 3 years later) on a new computer, and also playing from a different country. I installed a new Titanium, and reset my forum password.
In the setup steps on the forum guide I could honestly not remember if I had an EQemu account. I tried to type in the username and email to link them if I had one, but it kept telling me there was no match, so I chose the option to skip it. I saw that 'Step 5 - Game Setup' says it's not completed, but there's nothing left for me to do when I click the thread it link. I launched titanium through the 'Launch titanium' shortcut the guide suggests and try to login, but receive the DB error.
https://imgur.com/a/HfxkLDn <-- DB
It still says my Step 5 - Game Setup is still not completed, so I'm kinda of stuck with what to do now.
https://imgur.com/ZtxmUbo <-- Getting started CP
I tried reinstalling and making a really simple password but I have the same problem.
Any help would be appreciated, I'd really like to continue playing my character where I left off. Thanks!