12.4.5 Internet Connection is not stable enough to download latest toolchain
The feature covered in the link below is not available because your internet connection is determined to not be stable.
5.1.6.2 Download MPLAB XC Compilers
Alternately, find the latest MPLAB XC C compilers on the Microchip website:
www.microchip.com/en-us/development-tools-tools-and-software/mplab-xc-compilers