Keep getting error when trying to save a vst as a "default preset"

Hello, I just bought an MPE controler and strangely, not all plugins aren’t activated with MPE by default. So I’m going to each one, turning it on and then saving the vst as the default so every time I open it, the MPE will be activated. However, I keep getting this error. How do I fix this? Thank you!

@m.c Any thoughts on this?

I figured it out. I had click right click and select “get info” on the mac finder in that folder location, and change permissions on the bottom.