Hi @Ahmed_Saber
let me check this with owners of the T-Box. I can see two getting started documents and SW enablement guide and all of them says something different. I'm sure that specific RTD version needs to be used.
Generally, the RTD can be downloaded from S32K3 Standard Software Package. The link can be found here in the mentioned document:

this will redirect you here (RTD link highlighted)

I will let you know later which version should be used exactly.
And notice that this document provides more details about the installation:
https://www.nxp.com/webapp/Download?colCode=TP-S32K3-T-BOX-SW-ENABLEMENT-GUIDE
Regards,
Lukas