I'm using Mojave + Ableton 11

When I try to open the stand alone Aria player I get the alert: "Cannot connect to engine, please re-install"

When I try to open in Ableton: "Do you want to go online to obtain an activation card for this product?". Since I already have an activation card I click "No" and then I get: "Do you want to unregister this product to make this message go away?"

I've tried to install both 1.959 and 1.872. I tried uninstalling everything using ARIA_Uninstaller 1.020, then restarting. Absolutely nothing works. 

Please help.