It's been reported by several users that they have a problem with alignment in the Declaration of War screen. Here is a helpful example of what they mean. Unfortunately it seems it's always a conflict with another mod that makes edits to the same file. When two or more mods edit the same file, the game loads one and then ignores the others.

One very common occurance is Arumba's shortcuts. Sadly there's no way to make them compatible. However, the way I see it, there's two things you can do if you still want most of the changes by either my mod or Arumba's.

1st option:
Go into the zipfile for Armuba's mod and delete "countrydiplomacyview.gui" from the "interface" folder inside it. His mod is probably located in "My Documents\Paradox Interactive\Europa Universalis IV\mod\" and the file is called "arumbakeyboardshortcuts.zip"
The effect should be that you have the layout as I made it with text at all the right places but you're missing out on Arumba's shortcuts for the diplomacy screens. But only those. All other things like province view and transferring army units should be fine.

2nd option:
Go into the zipfile for my mod and delete "diplomacy_declare_war_bg.dds" from the "interface" sub folder inside the "gfx" folder in the mod. Same location as Arumba's mod but the file is called "BiggerUi - V1.18.zip".
The effect should be that you have the standard DoW screen but ALL of Arumba's shortcuts.

Another possible solution would be that I merge Arumba's mod into this but I don't think that's fair to Arumba? Anyway, hope this helps.