I’ve successfully connected a third party opc-ua server based on Unified Automation SDK. On te gateway web page and using the Quick Client, I can read/write tags with no problem.
When using the Designer and dragging a single tag, the tag is correctly created with the right OPC server and item path but the value is “[null, Error_Configuration, Mon Dec 17 17:49:41 CET 2018]”. Dat type is also correct and there is no message in the designer console nor the designer log viewer.
Note: this is working well with the 7.9.10 OPC client.