Need solution to resolve the error getting in keil uvision 5.25 set up

Hi to all team members,

I am using Wis trio Lora tracker RAK5205 board  with STM32L1 ARM Cortex m3 low power microcontroller for development purpose.

I have install latest Keil uvision 5.25 and also update all packs. But than also i am getting error as per attached image as shown below:

• 1) “project requires ARM Toolchain which is not installed”
• 2) Not able to select target device and build option is also not accessible. Can you please suggest me the solution how to find and install toolchain.

       In this below image only software packs is visible not getting any option to select microcontroller based on family.

Its kind request to you to provide me the solution to resolve all these error as soon as possible.  

Thanks and regards,
RRJ