Lost Master Volume control in Cross 2.6 Using Pioneer DDJ-SX

I was happily using Cross 2.6 for a couple of years with my Pioneer DDJ-SX when all of a sudden The controller will no longer adjust master volume in the software. I p
refer Cross to Serato despite not supporting all the FX of controller. Is there a solution to this problem,
refer Cross to Serato despite not supporting all the FX of controller. Is there a solution to this problem,