MacOS builds doesn’t open

Hi,

I’ve been trying to package a production macOS app and it doesn’t launch.
I tried opening it with a terminal and it writes this:

/Applications/SynfigStudio.app/Contents/MacOS/SynfigStudio          
objc[94733]: Class GdkQuartzView is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgdk-3.0.dylib (0x1119ba540) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgdk-3.0.dylib (0x1106b3540). One of the two will be used. Which one is undefined.
objc[94733]: Class GdkQuartzNSWindow is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgdk-3.0.dylib (0x1119ba590) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgdk-3.0.dylib (0x1106b3590). One of the two will be used. Which one is undefined.
objc[94733]: Class gdkCoreCursor is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgdk-3.0.dylib (0x1119ba5e0) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgdk-3.0.dylib (0x1106b35e0). One of the two will be used. Which one is undefined.
objc[94733]: Class GtkClipboardOwner is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323ed20) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459d20). One of the two will be used. Which one is undefined.
objc[94733]: Class GtkDragSourceOwner is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323ed70) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459d70). One of the two will be used. Which one is undefined.
objc[94733]: Class GtkQuartzStatusIcon is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323edc0) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459dc0). One of the two will be used. Which one is undefined.
objc[94733]: Class ResultReceiver is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323ee38) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459e38). One of the two will be used. Which one is undefined.
objc[94733]: Class GtkApplicationQuartzDelegate is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323ee60) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459e60). One of the two will be used. Which one is undefined.
objc[94733]: Class GNSMenuItem is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323eeb0) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459eb0). One of the two will be used. Which one is undefined.
objc[94733]: Class GNSMenu is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323eed8) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459ed8). One of the two will be used. Which one is undefined.
objc[94733]: Class FilterComboBox is implemented in both /usr/local/Cellar/gtk+3/3.24.38/lib/libgtk-3.0.dylib (0x11323ef50) and /Applications/SynfigStudio.app/Contents/Resources/lib/libgtk-3.0.dylib (0x112459f50). One of the two will be used. Which one is undefined.

Any idea how to solve this? is it a bug or something related with our computers? I’ve tried it in several macOS computers and all of the end up with the same error…

Thanks!