Error:"Invalid API Argument" when modifying the access rules

The error "Invalid API Argument" occurs errors while creating/modifying/deleting/disabling the the bandwidth object on access rules, as shown in the below screenshot.

This issue is fixed in firmware version 7.1.2 and newer. Please update to the latest firmware version.

To upgrade to the latest firmware version, kindly refer to the KB article how-can-i-upgrade-sonicos-firmware