Using the https://github.com/arionum/lightWalletCLI, I'm getting the following error when I execute ./lightArionumCLI.php:

Fatal error: Default value for parameters with a class type hint can only be NULL in ./arionum/lightWalletCLI/lightArionumCLI.php on line 248

Any help to getting it to run would be greatly appreciated - can't start mining till I get the wallet generated, and don't have a windows machine.

EDIT: Its due to a older version of php on my system - error goes away if php 7.2 is used!