This is a recent issue on a system where it had been working just fine, and I am not sure if it is related to FCP or the source media.
Clip- 1280x720 ProRes
The issue is the plug-in hangs and fails due to critical XML errors. If not that, then it starts exporting the XML and crashes FCP. When relaunched the plug in finally works, although it takes quite a bit of time.I am only running Mail, not any type of browser or other apps.As I said, it was working on similar content that was encoded as DVCPRO HD.
I checked the Plug-in folder on the HD. I see 3 lock and load fx.plug files. v1.2.7(55), v.1.2.8(50) and Lock and Load FCPX 1.0. Is the issue the # of versions?