Unable to access download of drivers because portal is stuck

2

There is a known issue on the search button in SOURCE page:

Are you getting the same server error?

BTW, you can download the MBPL USB driver here:

https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.UQ0Tpwkw.EF7PVSSA.dpbs