Good day, I'm having this same error. OPC UA works fine in Editor but in a Build everything else works fine except OPC UA comms and I see in the console: "The specified license is not valid ... Opc.UaFx.Client.Licenser.set_LicenseKey"

Did you determine a fix for your issue? Thanks.

Thanks for the reply. Unfortunately this isn't working. I have no troubles with reading/writing to bytes or words in the DBs, or to read/write with PLC I/O bools, but can't get individual bools in DB to read/write.