1) PreSonus says this is a user forum, it's not part of PreSonus Support.
2) You are using discontinued products, but you can still get support for your hardware. Open a ticket with Support.
3) For general problems in using PreSonus equipment PreSOnus recommends to join one of the closed/private Facebook groups. This one is specialising in Classic and AI mixers:
Presonus StudioLive Mixer Users