There may be several reasons why you can’t initiate an Anonymous chat.
The Administrator of the organization first needs to enable the feature.
There must be either an HR admin or a Manager (direct Group Owner) you can address the anonymous chat to, otherwise you will not be able to initiate a chat.
The Company Settings decides if employees are allowed to initiate a chat while answering a question, and if an HR admin/Manager can initiate a chat while looking at result comments. Please check with your HR Admin to make sure you have been enabled to initiate a chat in the organization