I cannot connect TouchOSC to Simple Monsters in Logic

Logic will often overtake OSC signals coming into the DAW. Since Simple Monsters handles the OSC data internally, you will need to disable Logic’s internal OSC handling, by clicking on ‘Logic Pro X’ in the top right-hand corner of the screen, then ‘Control Surfaces’, then ‘Bypass All Control Surfaces’. Your OSC data should now be received by the plugin without issue.