Can not open audio plugin host app

I’m new to JUCE and following the tutorial. I was able to open the AudioPluginHost.app once before, but now when I try to open I’m getting an error stating “You can not open the application “AudioPluginHost.app” because it may be damaged or incomplete”. I’m following this tute I’ve tried deleting the whole JUCE app and reinstalling, restarting computer etc. Please help as I want to be able to complete each step of the tutorial.

Another thing I noticed is when I was able to open it before, I was unable to connect the red midi connectors to my app, but that might be another issue once I figure out this first one.

open the Plugin Host project in your IDE and recompile it. then proceed with your plugin project.

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Thanks.