I cannot get AmpliTube 5 to register in Logic Pro X 10.6.1 using MacOS 10.15.7. It is not available for selection as a plugin and further inspection via the Preferences->Plugin Manager in Logic reveals that the AU crashed and cannot be registered. Rebooting and scanning the AU again reveals the following messages:
validating Audio Unit AmpliTube 5 by IK Multimedia:
AU Validation Tool
Version: 1.7.0
Copyright 2003-2019, Apple Inc. All Rights Reserved.
Specify -h (-help) for command options
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VALIDATING AUDIO UNIT: 'aumf' - 'Atb5' - 'Ikmm'
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Manufacturer String: IK Multimedia
AudioUnit Name: AmpliTube 5
Component Version: 5.0.1 (0x50001)
* * PASS
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TESTING OPEN TIMES:
COLD:
validation result: crashed validation