Can't upload the sketch on RAK 11300 board

Welcome to the forum @Thant

I see the problem in your log.
It looks like you are trying to use the RAK4631 BSP for the RAK11300, That cannot work.
You need to install the matching BSP for the RAK11300

Then make sure you have selected the correct board before you upload the code:

If the download still doesn’t work, you might need to install the USB drivers manually.
Please check this post: Can't upload Arduino code on RAK11300 - #3 by beegee