"Tower already used"

I have received this message about 6 times in the past few days after activating a beacon tower, and attempting to influence maps via my tablets.

This is 100% game breaking. Hunting for towers is bad enough. Not being able to juice your maps = not playing the game.

I am also experiencing this issue, standard league. Tried clearing new towers, same results be they old or new, I can not use a precursor tablet in completed towers, I get the message, "Tower already used." Hoping for a fix in an update, my atlas is rather expansive and I'd rather not lose the dozens upon dozens of maps I still have available, but not being able to use towers is kinda miserable.

Same issue for me.

GGG, why aren't you fixing this and a lot more issues instead of introducing additional features?