"Incompatible Audio Units found" in Logic Pro

This article contains troubleshooting information

Incompatible Audio Units found.
While verifying Audio Unit compatibility, Logic Pro encountered X Audio Unit plug-in(s) which did not pass the Apple AU validation. These plug-ins have been excluded from further usage in Logic Pro to prevent possible problems or crashes. 
You can start the Plug-In Manager now to review the validation results or continue the startup process.

Source-Nexus Suite | Version 1.5.1 | macOS

Description

When users open Logic Pro, they receive a warning regarding incompatible audio unit plug-ins:

Actions

In order to use the Source-Nexus plugins, click “Start Plug-In Manager”. If you had already closed it:

1. Go to Logic Pro > Settings > Plug-In Manager.
2. Go to Manufacturer > “Source Elements”.
3. Check the “Use” box next to the failing plug-ins.
4. Click “Reset & Rescan selection”.

If the problem persists, please contact the support team. You will need to send them the Source-Nexus version you are on, Logic Pro and macOS versions.