17.64 removed the ability to turn table addresses into strings, this causes the game to crash because that's something the mod is doing
A possible fix that's been working for me is to change line 657 in control.lua from
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local sliderLabelCaption = tostring(playersGui["ACT-frame_"..event.player_index]["machineFlow"]["sliderFlow"]["sliderLabel"].caption)
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local sliderLabelCaption = playersGui["ACT-frame_"..event.player_index]["machineFlow"]["sliderFlow"]["sliderLabel"].caption[3]