“Guitar Rig 5.component” can’t be opened because Apple cannot check it for malicious software.

The standalone app runs fine. Logic Pro 10.5.0 plugin does not work. I get the following:

“Guitar Rig 5.component” can’t be opened because Apple cannot check it for malicious software.

Failed to load Audio Unit “Guitar Rig ”, please contact the manufacturer for an updated version or further assistance.


From Plug-In Manager:
validating Audio Unit Guitar Rig 5 FX by Native Instruments:

AU Validation Tool
Version: 1.7.0
Copyright 2003-2019, Apple Inc. All Rights Reserved.
Specify -h (-help) for command options

--------------------------------------------------
VALIDATING AUDIO UNIT: 'aufx' - 'NiG5' - '-NI-'
--------------------------------------------------
Manufacturer String: Native Instruments
AudioUnit Name: Guitar Rig 5 FX
Component Version: 5.2.2 (0x50202)

* * PASS
--------------------------------------------------
TESTING OPEN TIMES:
COLD:
FATAL ERROR: OpenAComponent: result: -1,0xFFFFFFFF


validation result: couldn’t be opened
validating Audio Unit Guitar Rig 5 MFX by Native Instruments:

AU Validation Tool
Version: 1.7.0
Copyright 2003-2019, Apple Inc. All Rights Reserved.
Specify -h (-help) for command options

--------------------------------------------------
VALIDATING AUDIO UNIT: 'aumf' - 'NiG5' - '-NI-'
--------------------------------------------------
Manufacturer String: Native Instruments
AudioUnit Name: Guitar Rig 5 MFX
Component Version: 5.2.2 (0x50202)

* * PASS
--------------------------------------------------
TESTING OPEN TIMES:
COLD:
FATAL ERROR: OpenAComponent: result: -1,0xFFFFFFFF


validation result: couldn’t be opened


I tried uninstalling Guitar Rig 5 and reinstalling, but the issue remains.