Zuul

Agreed. Seem worth reporting the matter in the case that maybe it's a conflict with the modpack. Thanks for the information. 8D

Only thing I can think of is that I tried the "X" to close it a few times, perhaps? A couple times before I even logged in, blank windows tend to make me apprehensive. The loot items from Prime are present so it seems it wasn't a necessary window to claim them.

I did just activate the Twitch Prime bit, so it seems a likely candidate. Though odd that it would be blank like that. The window did not reappear when I relogged in safe mode or when I logged in normally after that. Aslains_WoT_Logs.zip

Updated with the current pack today and when I logged in this window (shown at the top-left of the posted screenshot) appeared over top the login screen. As you can see, the window and buttons on it are blank. The "X" button just causes the window to flash but not close. Any idea what this is?

I'm also having a problem with this mod. I'm not using any mods from outside the modpack, but the button opens a window that is all in Russian.