Error: Access is denied. + The client methods called (or event/callback invoked) - by: micham

Hi,
I have a customer who is getting an error when trying to connect with a remote OPC DA server (Unicorn DA Server).
Access is denied. + The client methods called (or event/callback invoked)
Other browsers like Matrikon OPC Explorer works well. See the attached screen captures.


Exceptions

Type: System.UnauthorizedAccessException
Data:
HelpLink:
HResult: -2146233088 (0x80131500)
InnerException:
System.UnauthorizedAccessException: Access is denied.
+ The client method called (or event/callback invoked) was 'BrowseNodes'.
Data:
OpcLabs.EasyOpc.Implementation.ErrorEnhancement.Processed: True
OpcLabs.EasyOpc.Implementation.DAErrorEnhancement.Processed: True
HelpLink:
HResult: -2147024891 (0x80070005)
InnerException:
Message:
Access is denied.
+ The client method called (or event/callback invoked) was 'BrowseNodes'.
Source: OpcLabs.EasyOpcRaw.DataAccess.RawEasyDAClient
StackTrace:
TargetSite:
Message: Problem browsing OPC Data Access (OPC-DA) branches.
Source:
StackTrace:
TargetSite:

We are using Quick OPC 2021.1 (5.60.107.1)
Any idea how to fix?


Thank you.
Michael