Google "lightroom 5.7.1"
Canon 7D Mark II support was added in 5.7 so you should already be able to open those Raw files.
Is there a reason you are chasing the 5.7.1 update?
Did you start this new thread for a reason given the previous discussion?
I have downloaded the LR 5.7.1( advised to do so in the forum,as it is compatible with the 7D mark 11),and after several tries and phone calls to Adobe,i could finally managed to get to import my images. How that happened i’m still not sure,but it did happen!!!
thanks for your reply