I was being stupid with my attempts yesterday. I'm so used to launching Mabi through the .exe. If I launch it through Nexon Launcher though Abyss does work fine, except the secondary password mod doesn't work. Any thoughts as to why? ; -;
As to why... launchers do NOT work well with Abyss. This is why it's discouraged as they interfere with Abyss being able to run this part of itself. I'd say try again with:
MabiDirectLaunch (in Blade's Abyss thread at the end of the first post) to launch.
Make your own direct launch shortcut to launch.
Use MabiLauncherPlus by Logue to launch.
Use PowerPatcher by Xcelled194 to launch.
So you've quite a few options. I'd say pick one or several and give it a go.
I'm going to ask that the mod move yours and my reply to the appropriate thread. Please keep support under support or their respective threads, I wanted to reply now though so you could resolve your issue.