Controlling LED house lights on Express 24/48

New job, new problems. As our facilities lighting control specialist (building lighting panels), I was asked to take a look at our Express 24/48 system and figure out why our house lights no longer work properly with dimmers. It appears the problem arose a couple years ago when the facility was relit with LED bulbs. When we attempt to dim, flickering and failures. I am assuming the controller is not compatible with LED bulbs, just wondering if there is a way to adapt for LED control or if there are other options. Otherwise controller appears to work fine. 

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