The following guide only works for MacOS. Have you experienced this issue with Windows too? Let us know please.
Recently, some anti-viruses have started reporting Animation Composer as a threat. We assure you Animation Composer doesn't include anything harmful and is 100% safe to use. We've reported this each antivirus as false alarm. Some antivirus companies have already responded and fixed this in their database.
Until we get responses from all anti-virus companies you should be able to whitelist the plugin folders. The folder you have to whitelist can be found below:
1st folder exception (Finder shortcut to go to folder is CMD + SHIFT + G)
2nd folder exception
Here is how to resolve the issue for Avast:
Here is how to resolve the issue for AVG: