Tablet in completed tower unable

Hey,

All my tower in the endgame map is unable to evolving my map with the tablet.
When I'm finish the tower and reopen it, it's still show me the same option like the tower before without the option to put tablet and increase the map progress.

Hope you can tell me how to fix it.

Thank

The system with tablets have been change since last month.
You no longer place tablets in tower but together with your waystones in the map device.

https://www.pathofexile.com/forum/view-thread/3862213