It was literally listed on the site in a small section inan article that for the time being, the ability to augment with the enhancers has been disabled.
If I can find it again, I will link it in an edit.
Here you go.:
Temporarily unavailable features
*The following features are temporarily unavailable due to bugs.
We are currently working on fixing and resuming them, and appreciate your patience.
Gather Party Members in PSO2:NGS
*Although this option can be selected in the game, it is not working. We are sorry for the inconvenience.
Changing the display format of the Inventory
Adding an Augment and using an item to enhance the success rate
*If an item is used to increase the success rate, such as the N-Augmentation Success Rate +10%,
an error message appears and the Augment will not be added.
We are very sorry for the inconvenience, but until this bug is fixed,
success-enhancement items are not usable during Augmentation.
Transfer to a Challenge Block or a Battle Block
Please note that while players can select these options in the game, the transfer will not occur.