There was the error -2144326122: Failed login on OPC UA server in the logger after trying to connect from UaExpert. The connection in UaExpert was configured with the Anonymous user and was closed with the error BadUserAccessDenied. The Anonymous authentication method was allowed in the OPC UA configuration. The project was migrated from AS 3.0.90 to AS 4.5.
A root cause was that the Anonymous user was missing in the Configuration View. The AccessAndSecurity folder was not added during migration.
It could be a tricky error to diagnose since AccessAndSecurity folder is added automatically if you create a new project in AS 4.
