I know this may have a quite simple answer but I just dont know how lol
For further info on my problem:
I have completed HT-15 of the second set, yet the game does not show me the option to claim reward, but does show the option to "Improve Result." I contacted WG and they suggested getting rid of my mods in case they are causing any visual bugs. (Im pretty sure this isnt an issue because Ive also just completed TD-15 and no problems)
If you have a better suggestion of getting my HT-15 reward w/o having to install, id probably be more apt to trying that lol