Can't upgrade Resurgir TDs past potential lvl 1

I can't seem to upgrade this set of daggers past the first potential. I keep getting the connection error message even though I am not using any modifiers and I was able to add augments and enhance the weapon to level 40. I have not yet tried to see if I can add potential to anything else but I'd rather not waste the materials. Is anyone else having this issue?


OK so this appears to be resolved. I'm not sure if it's related but I equipped the weapon and went out and killed things with them for a bit then when I came back to town I was able to do the potential upgrades.

Still very strange as my alliance members have confirmed they did not have to use a weapon before maxing out it's potentials. Maybe something for SEGA to look into anyway.