First I am very sorry if this has been brought up before or was places in the wrong spot.

I notice in the Bacta Tank rules. That an NPC can be placed within one to heal. So far, I have tried to do this and all I get is a lengthy message that tells me it can not be done. I have followed all I can on the rule page, and so I wanted to know if this feature is active yet, or if this is a bug?

It's a bug that has already been reported. If possible, please search the bugbase for one of the (at least) two reports and post the error message you receive into the one that's not marked as "duplicate of".