When spawner is running as a service I get this error when rendering scene containing MCG modifier:

But later on if I restart spawner service on server machine I can render without problems.
It looks like vray is saving the missing MCG somewhere and after restart spawner service can use of it.
It's worth noticing that all MCG are installed on client machine.
The problem does not occur when spawner is used in regular way (not as a service).
win 10, max 2020, V-Ray 5
Spawner service is running on local system account:

But later on if I restart spawner service on server machine I can render without problems.
It looks like vray is saving the missing MCG somewhere and after restart spawner service can use of it.
It's worth noticing that all MCG are installed on client machine.
The problem does not occur when spawner is used in regular way (not as a service).
win 10, max 2020, V-Ray 5
Spawner service is running on local system account:
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