1st Time I've had a Library become unusable - HELP!

Original iMac Pro, 64GB RAM, Vega 64, 28TB Promise RAID, macOS 10.15.6, FCPX 10.4.9.
A single 1 hour and 17 minute duration documentary project inside 285 GB library, with only two Events.
I can access all media in the Browser and play it all in the Browser just fine.

When I click on the Project, I see the preview icon in the Browser just fine, but for only two seconds, then BANG!
Unexpected quit, crash, done.

I've trashed renders and prefs.

This library is being updated from an FCPX 10.4.8 version. Going back to 10.4.8 could be possible if I had a copy to download from somewhere. This system was updated before I got this Library to work with.

I can email anyone a copy of the full crash report, but here's the part usually used for troubleshooting. I see the TwinFX by Coremelt mentioned, and I see "unversioned libcrypto dylib" mentioned, but no clue what that is. Is this really Coremelt specific?

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Process: Final Cut Pro [73240]
Path: /Applications/Final Cut Pro.app/Contents/MacOS/Final Cut Pro
Identifier: com.apple.FinalCut
Version: 10.4.9 (376482)
Build Info: ProEditor-37648002018000000~2 (16A312)
App Item ID: 424389933
App External ID: 837325800
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Final Cut Pro [73240]
User ID: 501

PlugIn Path: /Applications/Coremelt/VTwinFx.app/Contents/PlugIns/VTwinFx.pluginkit/Contents/PlugIns/VTwinFx.fxplug/Contents/MacOS/VTwinFx
PlugIn Identifier: com.pixlock.FxPlug.VTwinFx.fxplug
PlugIn Version: 2.4.4 [512.1] (2.4.4 [512.1])

Date/Time: 2020-09-05 11:26:29.902 -0500
OS Version: Mac OS X 10.15.6 (19G2021)
Report Version: 12
Bridge OS Version: 4.6 (17P6610)
Anonymous UUID: 2E8CCFEC-39BE-7D5A-5159-1AE3AC15C9BA


Time Awake Since Boot: 160000 seconds

System Integrity Protection: enabled

Crashed Thread: 37 BGTask: MEBackgroundLoadManager Dispatch queue: NSOperationQueue 0x7fb835fa74d0 (QOS: UNSPECIFIED)

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY

Application Specific Information:
/usr/lib/libcrypto.dylib
abort() called
Invalid dylib load. Clients should not load the unversioned libcrypto dylib as it does not have a stable ABI.

Try uninstalling the CoreMelt plugins and reinstalling them.

Actually no need to uninstall. Just downloaded the installer (updated recently) and run. It will overwrite previous installations.

I also updated FxFactory.

For good measure, I also trashed renders and prefs again after that and I think we're stable again.