Hi there @Fderamond
What I would suggest is to perform a manual uninstall of ANA 2
- The guide isn't up to date, it's missing the path to remove the VST 3 plug-in, here it is, so don't forget to delete the .vst3 file as well
WIN Path for the VST 3 : C:/Program Files/Common Files/VST3 remove ANA2 x64.vst3
MacOS Path for the VST 3 : Your MAC HDD DRIVE/Library/Audio/Plug-Ins/VST3 remove ANA2.vst3
Then reboot your PC and make a new installation with a fresh download of the v2.0.98 ANA 2 installer from you account but SKIP and DON'T INSTALL the VST3 when running the installer.
Then try to open your previous project again and report back. It might still not work ( already been reported in previous post by Digivolt ) but for now it's better not installing the VST 3 plug-in if you're using Studio One. We believe that there's an issue on their end and latest 5.3 update doesn't bring any change to this.