Your system must meet the minimum specifications to run ERA plug-ins,
Final Cut Pro: 10.4.10, 10.5,10.5.1
macOS: 10.14.6, 10.15.7
Note: ERA plug-ins are not yet compatible with Final Cut Pro in macOS Big Sur (11). Please, follow this article for future updates.
Below is a list of the supported ERA plug-ins for Final Cut Pro.