Please follow the below steps:
Make sure your boost pump is working.
Check all water diverter and venturi valves are open.
Please check all jet faces are open and have been positioned correctly (all jet faces need to be turned past their first natural stopping point)
If the jets are still not working it could mean there is an airlock in hose connection to the jets and may need to be bleed through loosing the barrel unions on the circulation pump.
If you believe you have an airlock, please follow the video below on how to bleed an airlock through the pump. (Please note that the video mentions xs-3c but the boost pump is xs-30. or WP250)