In order to run Arcade on certain versions of Pro Tools, Microsoft Edge WebView2 runtime must be installed (don’t worry, it’s free). You can find the installer for Microsoft Edge WebView2 runtime below:
Download Microsoft Edge WebView2
You will want to download the “Evergreen Bootstrapper” installer from that page, to install Microsoft Edge WebView2 runtime. After installing Microsoft Edge WebView2 runtime, please relaunch Pro Tools and you should be good to go with Arcade!
If Microsoft Edge WebView2 runtime isn’t an option for your system, you can install an older compatible version of Arcade here v1.3.11: