If activating VocALign Project causes Pro Tools to crash, you must be using an older version of the plug-in.
(This crash is most frequent with macOS 10.14 Mojave.)
VocALign Project 18.104.22.168 AAX resolved this issue.
Updating VocALign Project AAX to the latest version will stop the crashes.
Please download the latest VocALign Project AAX installer from our Downloads page or from the DAW Integration page for VocaLign Project with Pro Tools