I have the same question as the poster. Here's my scenario:
I picked the King of France 1066. From the beginning there was a notification saying I could press the claim for the county of Vivarais. Vivarais is controled by a Count, his liege is the Duke of Provence, and his liege is the Kaiser- in Nassau. When I go to declare war the option is gray. All the tool tips are green and good to go but one with a red X "___ of Vivarais is Independent."
I next ran into the same text explanation when trying to declare war in Florez, controlled by a Count, who also controls Lyon, directly under the Kaiser- after my Chancellor had successfully fabricated the claim.
In this case, you would have to declare war on the Emperor. You always have to attack the person at the top of the feudal chain. The only exception is when you're a vassal attacking another vassal of the same liege. (for example, the Duke of Lombardia attacking the Duchess of Tuscana - they're both direct vassals of the Emeperor), and even in that case, you can't do that once crown authority hits medium.
The blocking tooltip says: Countess Inga of Oland must be our Liege or Vassal of our Liege
But, she's INDEPENDENT.....so we can't attack independents now? lol
She is part of the Duchy of Ostergotland which is part of Sweden who's liege is the King of Sweden. I don't see anything that tells me the Duchy of Ostergotland is independent as I CAN attack it I guess because I have a claim on Oland, but, Oland is independent so it doesn't make sense that I can't attack an independent vassal?? Or does it?
"Independant vassal" is a contradiction. Either you're independant, or you're a vassal. You can't be both. If I'm reading you correctly, the Coutness of Oland is a vassal of the Duke of of Ostergotland, who is a vassal of the King of Sweden. I'm not positive what your situation is. If you're also a vassal of the King of Sweden, you should be able to attack the Ostergotland. UNLESS crown authority is medium or higher, in which case this kind of fighting is prohibited. If you're not a vassal of Sweden, then you'll have to declare war on the King himself.
These rules for declaring war are universal. If there's a crusade for Jerusalem and it's controlled by some random nobody sheik who happens to be part of the caliphate, I can't attack him directly. I have to declare war on the Caliph himself and take on all his armies. It works the same here.