Cannot save preset in digital performer

My plugin has the exact same code for presets/programs as the juce demo plugin. I however have a really weird problem, only in digital performer. Whenever I try to save a preset, I just get an error sound and nothing happens. If I try to "reveal presets in finder", nothing happens, no error or whatsoever. I can save presets with the juce demo plugin, and I can also save presets with my plugin in all other hosts... so the problem is only in DP. 

I checked in the introjucer that my Plugin name and manufacturer don't include any weird characters, which could cause an error when DP tries to create a folder in ~/Library/Audio/Presets/, but it seems fine... Also, if that were a problem, I feel like it wouldn't work anywhere, not just in DP.

Any idea what may be wrong?