It's saying I need 4294776296 favor to rank up from affinity 6 to 7 Haven't noticed this on any other allies, although I only have a handful that need breakthroughs at the moment
Thanks for the report O.W.L., I think I've found the issue that's causing the error in the display, and it is indeed related to Allies that currently have more Favor XP than is needed to level up. Big Will is correct though, it is only an error with the numbers in the display and it should not prevent you from completing the level up action. This one snuck through because the favor/alliance display was added to the updated UI relatively late, after I had already tested and confirmed the ability to level up allies with an excess of favor. In any case, I'll get to work on getting the display fixed. Thanks again!