Psychopy not launching on MacOS Catalina 10.15.7 after Anaconda install

I installed PsychoPy (2020.2.4.post1) with Conda using the environment file, macOS Catalina 10.15.7.

The GUI simply does not launch, and there is no error message.

Below are some system messages around start-up time. Do you have any idea what could be going wrong?

“PlugIns” is missing, yes - but the error is non-fatal?

Many thanks, Steffen

default 20:50:43.939358+0200 python MessageTracer: Falling back to default whitelist
default 20:50:43.940532+0200 python Received configuration update from daemon (initial)

default 20:50:43.968077+0200 python FRONTLOGGING: version 1
default 20:50:43.968096+0200 python Registering, pid=43104
default 20:50:43.969197+0200 python CHECKIN: pid=43104
default 20:50:43.979659+0200 python CHECKEDIN: pid=43104 asn=0x0-0x68b68b foreground=1

default 20:50:43.984801+0200 python Registered, pid=43104 ASN=0x0,0x68b68b
default 20:50:43.985058+0200 python Registered, pid=43104 cgConnectionID=7846f

default 20:50:43.988567+0200 python BringForward: pid=43104 asn=0x0-0x68b68b bringForward=0 foreground=1 uiElement=0 launchedByLS=0 modifiersCount=0 allDisabled=0

default 20:50:43.990597+0200 python Current system appearance, (HLTB: 2), (SLS: 1)
default 20:50:43.996922+0200 python Post-registration system appearance: (HLTB: 2)

default 20:50:44.003536+0200 lsd Non-fatal error enumerating at , continuing: Error Domain=NSCocoaErrorDomain Code=260 “The file “PlugIns” couldn’t be opened because there is no such file.” UserInfo={NSURL=PlugIns/ – file:///Users/steffen/opt/anaconda3/envs/psychopy/, NSFilePath=/Users/steffen/opt/anaconda3/envs/psychopy/, NSUnderlyingError=0x7ff938961160 {Error Domain=NSPOSIXErrorDomain Code=2 “No such file or directory”}}

default 20:50:44.003608+0200 lsd - 45683955: Checking whether application is managed at file:///Users/steffen/opt/anaconda3/envs/psychopy/

default 20:50:44.058867+0200 python NSApp cache appearance: -NSRequiresAquaSystemAppearance: 1 -appearance: (null) -effectiveAppearance: <NSCompositeAppearance: 0x7fd384c19690 ( “<NSAquaAppearance: 0x7fd404ce38e0>”, “<NSSystemAppearance: 0x7fd404ce7c00>”)>

default 20:50:44.073493+0200 python ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to (null)

default 20:50:44.382281+0200 python HALPlugInManagement::RegisterPlugIns: skipping in-process plug-ins

error :50:44.382365+0200 python AddInstanceForFactory: No factory registered for id <CFUUID 0x7fd444e4aa80> F8BB1C28-BAE8-11D6-9C31-00039315CD46

default 20:50:44.559318+0200 python SetFrontProcess: asn=0x0-0x68b68b options=0
default 20:50:44.566159+0200 python Registering for test daemon availability notify post.
default 20:50:44.566464+0200 python notify_get_state check indicated test daemon not ready.
default 20:50:44.613239+0200 python SignalReady: pid=43104 asn=0x0-0x68b68b
default 20:50:44.613697+0200 python SIGNAL: pid=43104 asn=0x0x-0x6862475
default 20:50:54.007611+0200 python LSExceptions shared instance invalidated for timeout.
default 20:52:59.126955+0200 python MessageTracer: Falling back to default whitelist