Can't access API mode

I have a XBEE-PRO XSC(S3B)9600 of product family XBP9B-XC.
the modes which i can see while using XCTU are 1-transparent[0] 2-unavailable[1] 3-unavailable[2]
4-repeater[3] 5-repeater end node[4].

The unavailable mode is the Api mode which i need.
i tried to access command mode and changed it,but it gave me an ERROR.

So, Is there a way to change the mode from AT to API or this XBEE doesn’t have !

Hi, I’m having the same issue with my board! Did you find a solution?