Actually I had the Same Bug Today
I also had 6 Digits in the Key but when I looked it should only have 5
Reason was actually simple
Each time I pastet the Key into the Window he put the first Digit two
The Key worked after I simply deletet the first Digit
Try deleting the first Digit after pasting the key into the window
or just tyoe it by hand to avoid mistakes
maybe that works better
In the Shadow of the Black Cross. We Fullfill our Duty in your Name.
And Look forward to the Day we Return to your side Silvanos.
Watching over our Comrades as they Fullfill their Duty in your Name.