Your system must meet the minimum specifications to run ERA plug-ins,
Final Cut Pro: 10.5.4, 10.6.1
macOS: 10.15.7, 11.6, 12.1 (Monterey) (Intel and M1 Processors)
Below is a list of the supported ERA plug-ins for Final Cut Pro.
Note: The ERA 5 Audio Clean-Up Assistant is not compatible with Final Cut Pro. The ERA 6 Audio Clean-Up Assistant is partly compatible with Final Cut Pro.
You can read more about the best practices for audio editing in Final Cut Pro X in our article here.
For more info on how to resolve a crash in Final Cut Pro X you can refer to this article.