Similar problem as reported here viewtopic.php?t=39889 .
I have removed a custom action "LaunchFile" from my project but when running the installer I get the following:
As you can see there is no "LaunchFile" custom action listed in the Existing Custom Actions box however the installation fails apparently because it returns an error.
I have closed and re-opened the project a couple of times but the issue remains.
I'm using AI v20.3.2 .