thanks, after upgrade to Monterey the issue is gone
TomasNaplava
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I found an error log message which confirms this is really a permission related issue. Could you please suggest how to set the permissions to make this work? Adding the bundle path to com.apple.security.temporary-exception.files.absolute-path.read-only didn't help - this entitlement is missing in the built driver, so it must have been somehow stripped during the build.